Amazon AWS Certified Solutions Architect Associate SAA-C03 Network Transfer Egress and Connectivity Economics Practice Test

 

Topic 19 covers network transfer egress and connectivity economics for the AWS Certified Solutions Architect – Associate certification. These original practice questions apply the verified SAA-C03 objectives to practical decisions and troubleshooting. Select one answer unless a fixed number is requested. For broader preparation, visit the AWS Certified Solutions Architect Associate SAA-C03 Exam Dumps page. Each option includes an explanation of the relevant behavior and scenario constraints.

Question 1

Private subnets in three AZs send heavy internet traffic through one NAT gateway in a fourth AZ path. Which cost-aware resilient design should be evaluated?

1. Deploy one NAT gateway per AZ and use AZ-local routes.
2. Compare the NAT gateway hourly/processing charges with the lab requirement and supported alternatives before retaining it.
3. Use an egress-only internet gateway for outbound-initiated IPv6 internet access.
4. Use a NAT gateway in each active AZ and route private subnets to their local NAT when the traffic volume/resilience justifies it.
5. Create an S3 gateway VPC endpoint and route eligible S3 traffic through it.

Correct Answer: D

 

Correct Answer

Answer D is correct because AWS documents local-AZ NAT placement as a way to avoid cross-AZ data transfer and remove a shared egress dependency. This directly meets the decisive requirement: NAT gateway per AZ with local routing.

Incorrect Answers

Answer A is incorrect because AZ-local egress removes the single cross-AZ NAT dependency and avoids cross-AZ transfer for traffic to the NAT in another AZ. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: NAT gateway per AZ with local routing.

Answer B is incorrect because For tiny intermittent workloads the fixed availability charge can dominate, but any alternative must still meet security and operations requirements. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: NAT gateway per AZ with local routing.

Answer C is incorrect because IPv6 does not require address translation; the egress-only gateway provides outbound initiation without unsolicited inbound reachability. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: NAT gateway per AZ with local routing.

Answer E is incorrect because Gateway endpoints for S3 have no additional endpoint charge and avoid sending that service traffic through the NAT gateway. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: NAT gateway per AZ with local routing.

 

Question 2

Most private-subnet egress is to S3 in the same Region and currently passes through a NAT gateway. Which change can eliminate NAT processing for that traffic?

1. Use an egress-only internet gateway for outbound-initiated IPv6 internet access.
2. Compare the NAT gateway hourly/processing charges with the lab requirement and supported alternatives before retaining it.
3. Create an S3 gateway VPC endpoint and route eligible S3 traffic through it.
4. Use a NAT gateway in each active AZ and route private subnets to their local NAT when the traffic volume/resilience justifies it.
5. Deploy one NAT gateway per AZ and use AZ-local routes.

Correct Answer: C

 

Correct Answer

Answer C is correct because Gateway endpoints for S3 have no additional endpoint charge and avoid sending that service traffic through the NAT gateway. This directly meets the decisive requirement: S3 gateway endpoint.

Incorrect Answers

Answer A is incorrect because IPv6 does not require address translation; the egress-only gateway provides outbound initiation without unsolicited inbound reachability. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: S3 gateway endpoint.

Answer B is incorrect because For tiny intermittent workloads the fixed availability charge can dominate, but any alternative must still meet security and operations requirements. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: S3 gateway endpoint.

Answer D is incorrect because AWS documents local-AZ NAT placement as a way to avoid cross-AZ data transfer and remove a shared egress dependency. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: S3 gateway endpoint.

Answer E is incorrect because AZ-local egress removes the single cross-AZ NAT dependency and avoids cross-AZ transfer for traffic to the NAT in another AZ. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: S3 gateway endpoint.

 

Question 3

An IPv6-only workload needs outbound internet access but no unsolicited inbound connections. Which component avoids using an IPv4 NAT gateway for that purpose?

1. Use an egress-only internet gateway for outbound-initiated IPv6 internet access.
2. Deploy one NAT gateway per AZ and use AZ-local routes.
3. Use a NAT gateway in each active AZ and route private subnets to their local NAT when the traffic volume/resilience justifies it.
4. Create an S3 gateway VPC endpoint and route eligible S3 traffic through it.
5. Compare the NAT gateway hourly/processing charges with the lab requirement and supported alternatives before retaining it.

Correct Answer: A

 

Correct Answer

Answer A is correct because IPv6 does not require address translation; the egress-only gateway provides outbound initiation without unsolicited inbound reachability. This directly meets the decisive requirement: egress-only internet gateway.

Incorrect Answers

Answer B is incorrect because AZ-local egress removes the single cross-AZ NAT dependency and avoids cross-AZ transfer for traffic to the NAT in another AZ. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: egress-only internet gateway.

Answer C is incorrect because AWS documents local-AZ NAT placement as a way to avoid cross-AZ data transfer and remove a shared egress dependency. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: egress-only internet gateway.

Answer D is incorrect because Gateway endpoints for S3 have no additional endpoint charge and avoid sending that service traffic through the NAT gateway. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: egress-only internet gateway.

Answer E is incorrect because For tiny intermittent workloads the fixed availability charge can dominate, but any alternative must still meet security and operations requirements. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: egress-only internet gateway.

 

Question 4

A tiny lab sends almost no outbound traffic, but a NAT gateway runs 24×7. Which question should the architect evaluate before keeping it?

1. Create an S3 gateway VPC endpoint and route eligible S3 traffic through it.
2. Use a NAT gateway in each active AZ and route private subnets to their local NAT when the traffic volume/resilience justifies it.
3. Deploy one NAT gateway per AZ and use AZ-local routes.
4. Use an egress-only internet gateway for outbound-initiated IPv6 internet access.
5. Compare the NAT gateway hourly/processing charges with the lab requirement and supported alternatives before retaining it.

Correct Answer: E

 

Correct Answer

Answer E is correct because For tiny intermittent workloads the fixed availability charge can dominate, but any alternative must still meet security and operations requirements. This directly meets the decisive requirement: whether another supported egress design is more economical.

Incorrect Answers

Answer A is incorrect because Gateway endpoints for S3 have no additional endpoint charge and avoid sending that service traffic through the NAT gateway. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: whether another supported egress design is more economical.

Answer B is incorrect because AWS documents local-AZ NAT placement as a way to avoid cross-AZ data transfer and remove a shared egress dependency. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: whether another supported egress design is more economical.

Answer C is incorrect because AZ-local egress removes the single cross-AZ NAT dependency and avoids cross-AZ transfer for traffic to the NAT in another AZ. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: whether another supported egress design is more economical.

Answer D is incorrect because IPv6 does not require address translation; the egress-only gateway provides outbound initiation without unsolicited inbound reachability. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: whether another supported egress design is more economical.

 

Question 5

Two private AZs must remain available independently and both need steady internet egress. Which topology avoids inter-AZ dependency on a single NAT gateway?

1. Use a NAT gateway in each active AZ and route private subnets to their local NAT when the traffic volume/resilience justifies it.
2. Compare the NAT gateway hourly/processing charges with the lab requirement and supported alternatives before retaining it.
3. Deploy one NAT gateway per AZ and use AZ-local routes.
4. Use an egress-only internet gateway for outbound-initiated IPv6 internet access.
5. Create an S3 gateway VPC endpoint and route eligible S3 traffic through it.

Correct Answer: C

 

Correct Answer

Answer C is correct because AZ-local egress removes the single cross-AZ NAT dependency and avoids cross-AZ transfer for traffic to the NAT in another AZ. This directly meets the decisive requirement: one NAT gateway per AZ.

Incorrect Answers

Answer A is incorrect because AWS documents local-AZ NAT placement as a way to avoid cross-AZ data transfer and remove a shared egress dependency. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: one NAT gateway per AZ.

Answer B is incorrect because For tiny intermittent workloads the fixed availability charge can dominate, but any alternative must still meet security and operations requirements. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: one NAT gateway per AZ.

Answer D is incorrect because IPv6 does not require address translation; the egress-only gateway provides outbound initiation without unsolicited inbound reachability. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: one NAT gateway per AZ.

Answer E is incorrect because Gateway endpoints for S3 have no additional endpoint charge and avoid sending that service traffic through the NAT gateway. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: one NAT gateway per AZ.

 

Question 6

EC2 instances in AZ-a repeatedly read from an internal service hosted only in AZ-b, generating large cross-AZ transfer. The service can run in each AZ. Which change can reduce movement?

1. Place service capacity in the same AZs as the consuming workloads when resilience and operations allow it.
2. Use an S3 gateway endpoint.
3. Replicate or cache read data in the application Region when consistency requirements allow it.
4. Use AWS PrivateLink for private service consumption without full VPC peering.
5. Use a content-distribution/cache strategy such as CloudFront when the data and access pattern are cacheable.

Correct Answer: A

 

Correct Answer

Answer A is correct because Reducing unnecessary cross-AZ bytes can lower transfer cost and latency while preserving independent AZ capacity. This directly meets the decisive requirement: place service capacity in each consuming AZ.

Incorrect Answers

Answer B is incorrect because The gateway endpoint keeps supported S3 traffic on the VPC service path without NAT gateway processing charges. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: place service capacity in each consuming AZ.

Answer C is incorrect because Local reads avoid repeated inter-Region requests and the associated latency and data-transfer volume. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: place service capacity in each consuming AZ.

Answer D is incorrect because PrivateLink exposes a service through interface endpoints and avoids establishing broad transitive routing relationships between provider and consumer VPCs. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: place service capacity in each consuming AZ.

Answer E is incorrect because Serving repeated content from edge caches can reduce repeated origin egress and improve user latency. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: place service capacity in each consuming AZ.

 

Question 7

Private instances download large software packages from S3 through NAT gateways. Which path reduces both NAT processing and internet-style routing?

1. Use AWS PrivateLink for private service consumption without full VPC peering.
2. Use a content-distribution/cache strategy such as CloudFront when the data and access pattern are cacheable.
3. Replicate or cache read data in the application Region when consistency requirements allow it.
4. Place service capacity in the same AZs as the consuming workloads when resilience and operations allow it.
5. Use an S3 gateway endpoint.

Correct Answer: E

 

Correct Answer

Answer E is correct because The gateway endpoint keeps supported S3 traffic on the VPC service path without NAT gateway processing charges. This directly meets the decisive requirement: S3 gateway endpoint.

Incorrect Answers

Answer A is incorrect because PrivateLink exposes a service through interface endpoints and avoids establishing broad transitive routing relationships between provider and consumer VPCs. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: S3 gateway endpoint.

Answer B is incorrect because Serving repeated content from edge caches can reduce repeated origin egress and improve user latency. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: S3 gateway endpoint.

Answer C is incorrect because Local reads avoid repeated inter-Region requests and the associated latency and data-transfer volume. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: S3 gateway endpoint.

Answer D is incorrect because Reducing unnecessary cross-AZ bytes can lower transfer cost and latency while preserving independent AZ capacity. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: S3 gateway endpoint.

 

Question 8

An internal producer sends the same 5-GB object to 1,000 consumers in other Regions every day. Which architecture should be evaluated to avoid repeated origin transfer?

1. Use an S3 gateway endpoint.
2. Replicate or cache read data in the application Region when consistency requirements allow it.
3. Place service capacity in the same AZs as the consuming workloads when resilience and operations allow it.
4. Use AWS PrivateLink for private service consumption without full VPC peering.
5. Use a content-distribution/cache strategy such as CloudFront when the data and access pattern are cacheable.

Correct Answer: E

 

Correct Answer

Answer E is correct because Serving repeated content from edge caches can reduce repeated origin egress and improve user latency. This directly meets the decisive requirement: cache/distribute closer to consumers.

Incorrect Answers

Answer A is incorrect because The gateway endpoint keeps supported S3 traffic on the VPC service path without NAT gateway processing charges. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: cache/distribute closer to consumers.

Answer B is incorrect because Local reads avoid repeated inter-Region requests and the associated latency and data-transfer volume. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: cache/distribute closer to consumers.

Answer C is incorrect because Reducing unnecessary cross-AZ bytes can lower transfer cost and latency while preserving independent AZ capacity. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: cache/distribute closer to consumers.

Answer D is incorrect because PrivateLink exposes a service through interface endpoints and avoids establishing broad transitive routing relationships between provider and consumer VPCs. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: cache/distribute closer to consumers.

 

Question 9

A SaaS service is consumed privately by hundreds of customer VPCs. Full peering meshes would create route and transfer complexity. Which model should be evaluated?

1. Use an S3 gateway endpoint.
2. Place service capacity in the same AZs as the consuming workloads when resilience and operations allow it.
3. Replicate or cache read data in the application Region when consistency requirements allow it.
4. Use AWS PrivateLink for private service consumption without full VPC peering.
5. Use a content-distribution/cache strategy such as CloudFront when the data and access pattern are cacheable.

Correct Answer: D

 

Correct Answer

Answer D is correct because PrivateLink exposes a service through interface endpoints and avoids establishing broad transitive routing relationships between provider and consumer VPCs. This directly meets the decisive requirement: PrivateLink.

Incorrect Answers

Answer A is incorrect because The gateway endpoint keeps supported S3 traffic on the VPC service path without NAT gateway processing charges. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: PrivateLink.

Answer B is incorrect because Reducing unnecessary cross-AZ bytes can lower transfer cost and latency while preserving independent AZ capacity. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: PrivateLink.

Answer C is incorrect because Local reads avoid repeated inter-Region requests and the associated latency and data-transfer volume. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: PrivateLink.

Answer E is incorrect because Serving repeated content from edge caches can reduce repeated origin egress and improve user latency. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: PrivateLink.

 

Question 10

An application in one Region calls another Region for every small database lookup even though the data can be replicated locally. Which cost/performance improvement should be considered?

1. Place service capacity in the same AZs as the consuming workloads when resilience and operations allow it.
2. Use AWS PrivateLink for private service consumption without full VPC peering.
3. Use an S3 gateway endpoint.
4. Use a content-distribution/cache strategy such as CloudFront when the data and access pattern are cacheable.
5. Replicate or cache read data in the application Region when consistency requirements allow it.

Correct Answer: E

 

Correct Answer

Answer E is correct because Local reads avoid repeated inter-Region requests and the associated latency and data-transfer volume. This directly meets the decisive requirement: place read data closer to application.

Incorrect Answers

Answer A is incorrect because Reducing unnecessary cross-AZ bytes can lower transfer cost and latency while preserving independent AZ capacity. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: place read data closer to application.

Answer B is incorrect because PrivateLink exposes a service through interface endpoints and avoids establishing broad transitive routing relationships between provider and consumer VPCs. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: place read data closer to application.

Answer C is incorrect because The gateway endpoint keeps supported S3 traffic on the VPC service path without NAT gateway processing charges. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: place read data closer to application.

Answer D is incorrect because Serving repeated content from edge caches can reduce repeated origin egress and improve user latency. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: place read data closer to application.

 

Question 11

A branch needs encrypted hybrid connectivity tomorrow and has moderate bandwidth over an existing internet circuit. Which connection is the fastest economical starting point?

1. Use AWS Site-to-Site VPN.
2. Use a Direct Connect hosted connection from an AWS Direct Connect Partner.
3. Design redundant hybrid connectivity across appropriate devices, locations, or a backup VPN as required.
4. Choose connectivity whose fixed commitment reflects normal sustained demand and handle rare bursts with an appropriate variable-capacity path.
5. Use AWS Direct Connect.

Correct Answer: A

 

Correct Answer

Answer A is correct because VPN uses existing internet connectivity and provides encrypted tunnels without the provisioning lead time of dedicated circuits. This directly meets the decisive requirement: Site-to-Site VPN.

Incorrect Answers

Answer B is incorrect because Hosted connections support sub-gigabit and other partner-provisioned bandwidth tiers without requiring a full dedicated port. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: Site-to-Site VPN.

Answer C is incorrect because A single physical connection remains a failure point regardless of its bandwidth or pricing model. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: Site-to-Site VPN.

Answer D is incorrect because A large always-on dedicated circuit can be economically inefficient when utilization is near zero most of the time. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: Site-to-Site VPN.

Answer E is incorrect because Direct Connect is designed for dedicated private connectivity and is appropriate to evaluate for sustained high-volume hybrid traffic. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: Site-to-Site VPN.

 

Question 12

A data center continuously transfers several gigabits per second to AWS and wants predictable private connectivity rather than internet transport. Which service should be evaluated?

1. Design redundant hybrid connectivity across appropriate devices, locations, or a backup VPN as required.
2. Use a Direct Connect hosted connection from an AWS Direct Connect Partner.
3. Choose connectivity whose fixed commitment reflects normal sustained demand and handle rare bursts with an appropriate variable-capacity path.
4. Use AWS Direct Connect.
5. Use AWS Site-to-Site VPN.

Correct Answer: D

 

Correct Answer

Answer D is correct because Direct Connect is designed for dedicated private connectivity and is appropriate to evaluate for sustained high-volume hybrid traffic. This directly meets the decisive requirement: Direct Connect.

Incorrect Answers

Answer A is incorrect because A single physical connection remains a failure point regardless of its bandwidth or pricing model. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: Direct Connect.

Answer B is incorrect because Hosted connections support sub-gigabit and other partner-provisioned bandwidth tiers without requiring a full dedicated port. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: Direct Connect.

Answer C is incorrect because A large always-on dedicated circuit can be economically inefficient when utilization is near zero most of the time. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: Direct Connect.

Answer E is incorrect because VPN uses existing internet connectivity and provides encrypted tunnels without the provisioning lead time of dedicated circuits. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: Direct Connect.

 

Question 13

A company needs Direct Connect but only 500 Mbps and does not need a full dedicated port. Which option should be evaluated?

1. Use AWS Direct Connect.
2. Choose connectivity whose fixed commitment reflects normal sustained demand and handle rare bursts with an appropriate variable-capacity path.
3. Design redundant hybrid connectivity across appropriate devices, locations, or a backup VPN as required.
4. Use a Direct Connect hosted connection from an AWS Direct Connect Partner.
5. Use AWS Site-to-Site VPN.

Correct Answer: D

 

Correct Answer

Answer D is correct because Hosted connections support sub-gigabit and other partner-provisioned bandwidth tiers without requiring a full dedicated port. This directly meets the decisive requirement: hosted connection through partner.

Incorrect Answers

Answer A is incorrect because Direct Connect is designed for dedicated private connectivity and is appropriate to evaluate for sustained high-volume hybrid traffic. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: hosted connection through partner.

Answer B is incorrect because A large always-on dedicated circuit can be economically inefficient when utilization is near zero most of the time. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: hosted connection through partner.

Answer C is incorrect because A single physical connection remains a failure point regardless of its bandwidth or pricing model. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: hosted connection through partner.

Answer E is incorrect because VPN uses existing internet connectivity and provides encrypted tunnels without the provisioning lead time of dedicated circuits. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: hosted connection through partner.

 

Question 14

A Direct Connect workload is business critical. Which design concern remains even after buying one connection?

1. Design redundant hybrid connectivity across appropriate devices, locations, or a backup VPN as required.
2. Use a Direct Connect hosted connection from an AWS Direct Connect Partner.
3. Use AWS Site-to-Site VPN.
4. Choose connectivity whose fixed commitment reflects normal sustained demand and handle rare bursts with an appropriate variable-capacity path.
5. Use AWS Direct Connect.

Correct Answer: A

 

Correct Answer

Answer A is correct because A single physical connection remains a failure point regardless of its bandwidth or pricing model. This directly meets the decisive requirement: redundant connectivity/failure path.

Incorrect Answers

Answer B is incorrect because Hosted connections support sub-gigabit and other partner-provisioned bandwidth tiers without requiring a full dedicated port. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: redundant connectivity/failure path.

Answer C is incorrect because VPN uses existing internet connectivity and provides encrypted tunnels without the provisioning lead time of dedicated circuits. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: redundant connectivity/failure path.

Answer D is incorrect because A large always-on dedicated circuit can be economically inefficient when utilization is near zero most of the time. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: redundant connectivity/failure path.

Answer E is incorrect because Direct Connect is designed for dedicated private connectivity and is appropriate to evaluate for sustained high-volume hybrid traffic. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: redundant connectivity/failure path.

 

Question 15

A workload sends a short 50-Mbps burst once a week and otherwise has almost no hybrid traffic. Which economic principle argues against overbuilding a large dedicated circuit solely for the burst?

1. Use a Direct Connect hosted connection from an AWS Direct Connect Partner.
2. Use AWS Site-to-Site VPN.
3. Design redundant hybrid connectivity across appropriate devices, locations, or a backup VPN as required.
4. Choose connectivity whose fixed commitment reflects normal sustained demand and handle rare bursts with an appropriate variable-capacity path.
5. Use AWS Direct Connect.

Correct Answer: D

 

Correct Answer

Answer D is correct because A large always-on dedicated circuit can be economically inefficient when utilization is near zero most of the time. This directly meets the decisive requirement: match connectivity commitment to sustained requirement.

Incorrect Answers

Answer A is incorrect because Hosted connections support sub-gigabit and other partner-provisioned bandwidth tiers without requiring a full dedicated port. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: match connectivity commitment to sustained requirement.

Answer B is incorrect because VPN uses existing internet connectivity and provides encrypted tunnels without the provisioning lead time of dedicated circuits. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: match connectivity commitment to sustained requirement.

Answer C is incorrect because A single physical connection remains a failure point regardless of its bandwidth or pricing model. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: match connectivity commitment to sustained requirement.

Answer E is incorrect because Direct Connect is designed for dedicated private connectivity and is appropriate to evaluate for sustained high-volume hybrid traffic. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: match connectivity commitment to sustained requirement.

 

Question 16

A global image site has a 95% CloudFront cache hit ratio. Which economic benefit follows directly?

1. Use AWS Global Accelerator.
2. Use the high cache hit ratio to reduce origin requests and origin data transfer for repeated content.
3. Use versioned asset names and cache them for longer where the deployment model permits.
4. Respect the private/no-store requirement and use CloudFront only for compatible edge features, not by overriding application cache semantics.
5. Keep only request values that truly change the response in the cache key.

Correct Answer: B

 

Correct Answer

Answer B is correct because Each cache hit is served from the edge rather than fetching the same object from the origin again. This directly meets the decisive requirement: fewer origin fetches.

Incorrect Answers

Answer A is incorrect because Global Accelerator optimizes TCP/UDP paths to healthy regional endpoints and does not depend on HTTP object caching. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: fewer origin fetches.

Answer C is incorrect because Versioning lets new deployments publish new object keys instead of invalidating a large number of old cached paths. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: fewer origin fetches.

Answer D is incorrect because A design must preserve confidentiality and correctness; a lower origin load does not justify caching content explicitly required to remain private. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: fewer origin fetches.

Answer E is incorrect because Unnecessary cache-key dimensions fragment the cache and reduce the probability that later requests reuse existing objects. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: fewer origin fetches.

 

Question 17

A CloudFront distribution forwards every unique tracking query string into the cache key even though the origin returns identical content. Which change can improve cache efficiency?

1. Use versioned asset names and cache them for longer where the deployment model permits.
2. Use the high cache hit ratio to reduce origin requests and origin data transfer for repeated content.
3. Use AWS Global Accelerator.
4. Keep only request values that truly change the response in the cache key.
5. Respect the private/no-store requirement and use CloudFront only for compatible edge features, not by overriding application cache semantics.

Correct Answer: D

 

Correct Answer

Answer D is correct because Unnecessary cache-key dimensions fragment the cache and reduce the probability that later requests reuse existing objects. This directly meets the decisive requirement: remove unnecessary values from cache key.

Incorrect Answers

Answer A is incorrect because Versioning lets new deployments publish new object keys instead of invalidating a large number of old cached paths. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: remove unnecessary values from cache key.

Answer B is incorrect because Each cache hit is served from the edge rather than fetching the same object from the origin again. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: remove unnecessary values from cache key.

Answer C is incorrect because Global Accelerator optimizes TCP/UDP paths to healthy regional endpoints and does not depend on HTTP object caching. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: remove unnecessary values from cache key.

Answer E is incorrect because A design must preserve confidentiality and correctness; a lower origin load does not justify caching content explicitly required to remain private. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: remove unnecessary values from cache key.

 

Question 18

A team invalidates millions of object paths after every deployment although assets can use versioned file names. Which publishing pattern can reduce invalidation work?

1. Use versioned asset names and cache them for longer where the deployment model permits.
2. Keep only request values that truly change the response in the cache key.
3. Use AWS Global Accelerator.
4. Use the high cache hit ratio to reduce origin requests and origin data transfer for repeated content.
5. Respect the private/no-store requirement and use CloudFront only for compatible edge features, not by overriding application cache semantics.

Correct Answer: A

 

Correct Answer

Answer A is correct because Versioning lets new deployments publish new object keys instead of invalidating a large number of old cached paths. This directly meets the decisive requirement: versioned object names/long TTL.

Incorrect Answers

Answer B is incorrect because Unnecessary cache-key dimensions fragment the cache and reduce the probability that later requests reuse existing objects. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: versioned object names/long TTL.

Answer C is incorrect because Global Accelerator optimizes TCP/UDP paths to healthy regional endpoints and does not depend on HTTP object caching. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: versioned object names/long TTL.

Answer D is incorrect because Each cache hit is served from the edge rather than fetching the same object from the origin again. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: versioned object names/long TTL.

Answer E is incorrect because A design must preserve confidentiality and correctness; a lower origin load does not justify caching content explicitly required to remain private. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: versioned object names/long TTL.

 

Question 19

A trading protocol uses non-HTTP TCP and cannot be cached, but global clients need optimized paths to regional endpoints. Which edge service is relevant?

1. Use AWS Global Accelerator.
2. Keep only request values that truly change the response in the cache key.
3. Respect the private/no-store requirement and use CloudFront only for compatible edge features, not by overriding application cache semantics.
4. Use versioned asset names and cache them for longer where the deployment model permits.
5. Use the high cache hit ratio to reduce origin requests and origin data transfer for repeated content.

Correct Answer: A

 

Correct Answer

Answer A is correct because Global Accelerator optimizes TCP/UDP paths to healthy regional endpoints and does not depend on HTTP object caching. This directly meets the decisive requirement: Global Accelerator.

Incorrect Answers

Answer B is incorrect because Unnecessary cache-key dimensions fragment the cache and reduce the probability that later requests reuse existing objects. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: Global Accelerator.

Answer C is incorrect because A design must preserve confidentiality and correctness; a lower origin load does not justify caching content explicitly required to remain private. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: Global Accelerator.

Answer D is incorrect because Versioning lets new deployments publish new object keys instead of invalidating a large number of old cached paths. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: Global Accelerator.

Answer E is incorrect because Each cache hit is served from the edge rather than fetching the same object from the origin again. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: Global Accelerator.

 

Question 20

A dynamic personalized page is marked private and must never be cached. Which statement is correct about using CloudFront?

1. Use the high cache hit ratio to reduce origin requests and origin data transfer for repeated content.
2. Respect the private/no-store requirement and use CloudFront only for compatible edge features, not by overriding application cache semantics.
3. Use AWS Global Accelerator.
4. Keep only request values that truly change the response in the cache key.
5. Use versioned asset names and cache them for longer where the deployment model permits.

Correct Answer: B

 

Correct Answer

Answer B is correct because A design must preserve confidentiality and correctness; a lower origin load does not justify caching content explicitly required to remain private. This directly meets the decisive requirement: CloudFront can still front origin but do not force caching solely for cost.

Incorrect Answers

Answer A is incorrect because Each cache hit is served from the edge rather than fetching the same object from the origin again. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: CloudFront can still front origin but do not force caching solely for cost.

Answer C is incorrect because Global Accelerator optimizes TCP/UDP paths to healthy regional endpoints and does not depend on HTTP object caching. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: CloudFront can still front origin but do not force caching solely for cost.

Answer D is incorrect because Unnecessary cache-key dimensions fragment the cache and reduce the probability that later requests reuse existing objects. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: CloudFront can still front origin but do not force caching solely for cost.

Answer E is incorrect because Versioning lets new deployments publish new object keys instead of invalidating a large number of old cached paths. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: CloudFront can still front origin but do not force caching solely for cost.

 

Question 21

Finance sees a large data-transfer bill and needs to identify whether bytes are inter-AZ, inter-Region, internet egress, or NAT processing. Which data source provides detailed usage types?

1. Inspect Elastic Load Balancing usage and processed-byte dimensions in billing data.
2. Use AWS Cost Explorer.
3. Use AWS Cost and Usage Reports to inspect detailed line items and usage types.
4. Establish consistent ownership/allocation dimensions such as accounts and activated tags for shared network resources.
5. Compare network usage types before and after the placement change, especially inter-AZ transfer.

Correct Answer: C

 

Correct Answer

Answer C is correct because CUR is the most detailed AWS billing dataset and is appropriate when the investigation requires distinguishing transfer and processing categories. This directly meets the decisive requirement: Cost and Usage Report.

Incorrect Answers

Answer A is incorrect because A flat compute workload can still produce higher load-balancer cost if processed bytes, connections, or chargeable usage dimensions changed. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: Cost and Usage Report.

Answer B is incorrect because Cost Explorer quickly visualizes and groups cost and usage so the analyst can locate the service/account/time period requiring deeper investigation. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: Cost and Usage Report.

Answer D is incorrect because Optimization is difficult when the organization cannot attribute spend to the consumers or products driving it. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: Cost and Usage Report.

Answer E is incorrect because The timing and topology change provide a testable hypothesis that should be verified in billing data rather than assumed. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: Cost and Usage Report.

 

Question 22

An engineer wants a quick graph of network-related monthly costs by service and linked account before deeper line-item analysis. Which tool should be used?

1. Use AWS Cost and Usage Reports to inspect detailed line items and usage types.
2. Use AWS Cost Explorer.
3. Establish consistent ownership/allocation dimensions such as accounts and activated tags for shared network resources.
4. Inspect Elastic Load Balancing usage and processed-byte dimensions in billing data.
5. Compare network usage types before and after the placement change, especially inter-AZ transfer.

Correct Answer: B

 

Correct Answer

Answer B is correct because Cost Explorer quickly visualizes and groups cost and usage so the analyst can locate the service/account/time period requiring deeper investigation. This directly meets the decisive requirement: Cost Explorer.

Incorrect Answers

Answer A is incorrect because CUR is the most detailed AWS billing dataset and is appropriate when the investigation requires distinguishing transfer and processing categories. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: Cost Explorer.

Answer C is incorrect because Optimization is difficult when the organization cannot attribute spend to the consumers or products driving it. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: Cost Explorer.

Answer D is incorrect because A flat compute workload can still produce higher load-balancer cost if processed bytes, connections, or chargeable usage dimensions changed. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: Cost Explorer.

Answer E is incorrect because The timing and topology change provide a testable hypothesis that should be verified in billing data rather than assumed. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: Cost Explorer.

 

Question 23

Shared network resources serve many teams but none of the resources are tagged or mapped to accounts consistently. What governance problem should be fixed?

1. Compare network usage types before and after the placement change, especially inter-AZ transfer.
2. Use AWS Cost Explorer.
3. Use AWS Cost and Usage Reports to inspect detailed line items and usage types.
4. Establish consistent ownership/allocation dimensions such as accounts and activated tags for shared network resources.
5. Inspect Elastic Load Balancing usage and processed-byte dimensions in billing data.

Correct Answer: D

 

Correct Answer

Answer D is correct because Optimization is difficult when the organization cannot attribute spend to the consumers or products driving it. This directly meets the decisive requirement: allocation model/tags/accounts.

Incorrect Answers

Answer A is incorrect because The timing and topology change provide a testable hypothesis that should be verified in billing data rather than assumed. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: allocation model/tags/accounts.

Answer B is incorrect because Cost Explorer quickly visualizes and groups cost and usage so the analyst can locate the service/account/time period requiring deeper investigation. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: allocation model/tags/accounts.

Answer C is incorrect because CUR is the most detailed AWS billing dataset and is appropriate when the investigation requires distinguishing transfer and processing categories. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: allocation model/tags/accounts.

Answer E is incorrect because A flat compute workload can still produce higher load-balancer cost if processed bytes, connections, or chargeable usage dimensions changed. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: allocation model/tags/accounts.

 

Question 24

After moving one workload to a different AZ, network cost increases. Which comparison is most useful?

1. Use AWS Cost and Usage Reports to inspect detailed line items and usage types.
2. Establish consistent ownership/allocation dimensions such as accounts and activated tags for shared network resources.
3. Compare network usage types before and after the placement change, especially inter-AZ transfer.
4. Inspect Elastic Load Balancing usage and processed-byte dimensions in billing data.
5. Use AWS Cost Explorer.

Correct Answer: C

 

Correct Answer

Answer C is correct because The timing and topology change provide a testable hypothesis that should be verified in billing data rather than assumed. This directly meets the decisive requirement: before/after usage-type and AZ transfer analysis.

Incorrect Answers

Answer A is incorrect because CUR is the most detailed AWS billing dataset and is appropriate when the investigation requires distinguishing transfer and processing categories. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: before/after usage-type and AZ transfer analysis.

Answer B is incorrect because Optimization is difficult when the organization cannot attribute spend to the consumers or products driving it. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: before/after usage-type and AZ transfer analysis.

Answer D is incorrect because A flat compute workload can still produce higher load-balancer cost if processed bytes, connections, or chargeable usage dimensions changed. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: before/after usage-type and AZ transfer analysis.

Answer E is incorrect because Cost Explorer quickly visualizes and groups cost and usage so the analyst can locate the service/account/time period requiring deeper investigation. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: before/after usage-type and AZ transfer analysis.

 

Question 25

A load balancer bill grows while compute traffic is flat. Which next step is most appropriate?

1. Compare network usage types before and after the placement change, especially inter-AZ transfer.
2. Establish consistent ownership/allocation dimensions such as accounts and activated tags for shared network resources.
3. Use AWS Cost Explorer.
4. Use AWS Cost and Usage Reports to inspect detailed line items and usage types.
5. Inspect Elastic Load Balancing usage and processed-byte dimensions in billing data.

Correct Answer: E

 

Correct Answer

Answer E is correct because A flat compute workload can still produce higher load-balancer cost if processed bytes, connections, or chargeable usage dimensions changed. This directly meets the decisive requirement: inspect load balancer usage dimensions and processed traffic.

Incorrect Answers

Answer A is incorrect because The timing and topology change provide a testable hypothesis that should be verified in billing data rather than assumed. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: inspect load balancer usage dimensions and processed traffic.

Answer B is incorrect because Optimization is difficult when the organization cannot attribute spend to the consumers or products driving it. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: inspect load balancer usage dimensions and processed traffic.

Answer C is incorrect because Cost Explorer quickly visualizes and groups cost and usage so the analyst can locate the service/account/time period requiring deeper investigation. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: inspect load balancer usage dimensions and processed traffic.

Answer D is incorrect because CUR is the most detailed AWS billing dataset and is appropriate when the investigation requires distinguishing transfer and processing categories. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: inspect load balancer usage dimensions and processed traffic.

 

Question 26

A public API is repeatedly scraped by one client and generates large backend and transfer cost. Which control can bound request rate at the API entry point?

1. Return only required fields and use appropriate compression/serialization.
2. Use CloudFront to cache and serve the repeated public files closer to viewers.
3. Remove unnecessary network hops while retaining required security and routing controls.
4. Use API Gateway throttling and, where appropriate, usage plans/authorization controls to bound request rates.
5. Reduce the polling frequency or use an event/push model that reflects how often data actually changes.

Correct Answer: D

 

Correct Answer

Answer D is correct because Rate controls protect downstream resources from excessive demand and can constrain the cost created by abusive clients. This directly meets the decisive requirement: throttling/usage plan.

Incorrect Answers

Answer A is incorrect because Reducing payload bytes directly reduces network transfer and often lowers application processing as well. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: throttling/usage plan.

Answer B is incorrect because Edge caching reduces repeated origin requests and origin data transfer for cacheable content. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: throttling/usage plan.

Answer C is incorrect because Each avoidable transit path can add transfer/processing charges and latency without delivering business value. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: throttling/usage plan.

Answer E is incorrect because Avoiding unnecessary requests removes network transfer and backend work rather than merely making each poll cheaper. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: throttling/usage plan.

 

Question 27

A mobile application polls every second for data that changes every five minutes. Which application change directly reduces network and backend cost?

1. Use API Gateway throttling and, where appropriate, usage plans/authorization controls to bound request rates.
2. Remove unnecessary network hops while retaining required security and routing controls.
3. Use CloudFront to cache and serve the repeated public files closer to viewers.
4. Return only required fields and use appropriate compression/serialization.
5. Reduce the polling frequency or use an event/push model that reflects how often data actually changes.

Correct Answer: E

 

Correct Answer

Answer E is correct because Avoiding unnecessary requests removes network transfer and backend work rather than merely making each poll cheaper. This directly meets the decisive requirement: reduce polling or use push/event model.

Incorrect Answers

Answer A is incorrect because Rate controls protect downstream resources from excessive demand and can constrain the cost created by abusive clients. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: reduce polling or use push/event model.

Answer B is incorrect because Each avoidable transit path can add transfer/processing charges and latency without delivering business value. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: reduce polling or use push/event model.

Answer C is incorrect because Edge caching reduces repeated origin requests and origin data transfer for cacheable content. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: reduce polling or use push/event model.

Answer D is incorrect because Reducing payload bytes directly reduces network transfer and often lowers application processing as well. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: reduce polling or use push/event model.

 

Question 28

A download application repeatedly serves the same public files from the origin to global users. Which architecture reduces repeat origin demand?

1. Reduce the polling frequency or use an event/push model that reflects how often data actually changes.
2. Return only required fields and use appropriate compression/serialization.
3. Remove unnecessary network hops while retaining required security and routing controls.
4. Use CloudFront to cache and serve the repeated public files closer to viewers.
5. Use API Gateway throttling and, where appropriate, usage plans/authorization controls to bound request rates.

Correct Answer: D

 

Correct Answer

Answer D is correct because Edge caching reduces repeated origin requests and origin data transfer for cacheable content. This directly meets the decisive requirement: CloudFront caching.

Incorrect Answers

Answer A is incorrect because Avoiding unnecessary requests removes network transfer and backend work rather than merely making each poll cheaper. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: CloudFront caching.

Answer B is incorrect because Reducing payload bytes directly reduces network transfer and often lowers application processing as well. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: CloudFront caching.

Answer C is incorrect because Each avoidable transit path can add transfer/processing charges and latency without delivering business value. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: CloudFront caching.

Answer E is incorrect because Rate controls protect downstream resources from excessive demand and can constrain the cost created by abusive clients. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: CloudFront caching.

 

Question 29

A service sends 10-MB responses but clients use only 50 KB. Which change directly reduces transfer?

1. Remove unnecessary network hops while retaining required security and routing controls.
2. Use CloudFront to cache and serve the repeated public files closer to viewers.
3. Use API Gateway throttling and, where appropriate, usage plans/authorization controls to bound request rates.
4. Reduce the polling frequency or use an event/push model that reflects how often data actually changes.
5. Return only required fields and use appropriate compression/serialization.

Correct Answer: E

 

Correct Answer

Answer E is correct because Reducing payload bytes directly reduces network transfer and often lowers application processing as well. This directly meets the decisive requirement: return only necessary data/compress.

Incorrect Answers

Answer A is incorrect because Each avoidable transit path can add transfer/processing charges and latency without delivering business value. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: return only necessary data/compress.

Answer B is incorrect because Edge caching reduces repeated origin requests and origin data transfer for cacheable content. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: return only necessary data/compress.

Answer C is incorrect because Rate controls protect downstream resources from excessive demand and can constrain the cost created by abusive clients. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: return only necessary data/compress.

Answer D is incorrect because Avoiding unnecessary requests removes network transfer and backend work rather than merely making each poll cheaper. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: return only necessary data/compress.

 

Question 30

A route sends traffic through two inspection/transit hops that no policy requires. Which optimization should be considered?

1. Return only required fields and use appropriate compression/serialization.
2. Use CloudFront to cache and serve the repeated public files closer to viewers.
3. Reduce the polling frequency or use an event/push model that reflects how often data actually changes.
4. Remove unnecessary network hops while retaining required security and routing controls.
5. Use API Gateway throttling and, where appropriate, usage plans/authorization controls to bound request rates.

Correct Answer: D

 

Correct Answer

Answer D is correct because Each avoidable transit path can add transfer/processing charges and latency without delivering business value. This directly meets the decisive requirement: simplify route path.

Incorrect Answers

Answer A is incorrect because Reducing payload bytes directly reduces network transfer and often lowers application processing as well. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: simplify route path.

Answer B is incorrect because Edge caching reduces repeated origin requests and origin data transfer for cacheable content. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: simplify route path.

Answer C is incorrect because Avoiding unnecessary requests removes network transfer and backend work rather than merely making each poll cheaper. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: simplify route path.

Answer E is incorrect because Rate controls protect downstream resources from excessive demand and can constrain the cost created by abusive clients. It can be useful in a different cost or architecture situation, but it does not meet the decisive requirement here: simplify route path.