CompTIA Network+ N10-009 Routing Technologies NAT PAT And Gateway Redundancy Practice Test

 

Objective 2.1 • 25 original questions

This CompTIA Network+ N10-009 practice test focuses on routing technologies. All questions are original ExamSnap scenarios aligned to the current N10-009 blueprint; they are not copied from CompTIA exam content. Use the complete N10-009 collection for broader practice across all five domains. For broader exam preparation, review the CompTIA Network+ N10-009 Exam Dumps page.

Instructions: Select the best answer for each question. Review the explanation after answering; each distractor includes a reason it is not the best choice for that scenario.

Question 1

At Litware Manufacturing, a systems administrator is reviewing a network change. The requirement is to use a fixed route for a stable small network or specific destination. Which option is the best fit? The decision applies to a branch-office rollout.

1. EIGRP
2. Static route
3. PAT
4. Routing metric
5. NAT

Correct answer: B

Why: A manually configured route is predictable and low-overhead but does not adapt automatically to topology changes. This directly satisfies the requirement: use a fixed route for a stable small network or specific destination.

Option review:

A: EIGRP is an advanced distance-vector routing protocol commonly associated with Cisco environments. However, it does not most directly satisfy the requirement in this scenario: use a fixed route for a stable small network or specific destination.

B: A manually configured route is predictable and low-overhead but does not adapt automatically to topology changes. This directly satisfies the requirement: use a fixed route for a stable small network or specific destination.

C: Port address translation lets many inside hosts share one or a small number of public addresses using transport ports. However, it does not most directly satisfy the requirement in this scenario: use a fixed route for a stable small network or specific destination.

D: A routing protocol metric selects among multiple routes learned by the same routing process. However, it does not most directly satisfy the requirement in this scenario: use a fixed route for a stable small network or specific destination.

E: Network address translation changes IP addresses between address domains. However, it does not most directly satisfy the requirement in this scenario: use a fixed route for a stable small network or specific destination.

Learning point: Use Static route when the key requirement is to use a fixed route for a stable small network or specific destination.

Question 2

A ticket at Woodgrove Bank says the team must exchange routes between autonomous systems or with an internet provider. Which technology or concept most directly addresses this requirement? The decision applies to a campus refresh.

1. PAT
2. Longest-prefix match
3. Virtual IP (VIP)
4. NAT
5. BGP

Correct answer: E

Why: BGP is a path-vector protocol used primarily for routing between autonomous systems and policy-based internet routing. This directly satisfies the requirement: exchange routes between autonomous systems or with an internet provider.

Option review:

A: Port address translation lets many inside hosts share one or a small number of public addresses using transport ports. However, it does not most directly satisfy the requirement in this scenario: exchange routes between autonomous systems or with an internet provider.

B: Routers prefer the route with the most specific matching prefix length. However, it does not most directly satisfy the requirement in this scenario: exchange routes between autonomous systems or with an internet provider.

C: A shared virtual address represents a redundant gateway/service rather than one physical node. However, it does not most directly satisfy the requirement in this scenario: exchange routes between autonomous systems or with an internet provider.

D: Network address translation changes IP addresses between address domains. However, it does not most directly satisfy the requirement in this scenario: exchange routes between autonomous systems or with an internet provider.

E: BGP is a path-vector protocol used primarily for routing between autonomous systems and policy-based internet routing. This directly satisfies the requirement: exchange routes between autonomous systems or with an internet provider.

Learning point: Use BGP when the key requirement is to exchange routes between autonomous systems or with an internet provider.

Question 3

During a design meeting at Blue Yonder Airlines, the junior network administrator needs to use the routing protocol identified in the objective as EIGRP. What should be selected? The decision applies to a data-center segment.

1. NAT
2. Routing metric
3. Virtual IP (VIP)
4. EIGRP
5. PAT

Correct answer: D

Why: EIGRP is an advanced distance-vector routing protocol commonly associated with Cisco environments. This directly satisfies the requirement: use the routing protocol identified in the objective as EIGRP.

Option review:

A: Network address translation changes IP addresses between address domains. However, it does not most directly satisfy the requirement in this scenario: use the routing protocol identified in the objective as EIGRP.

B: A routing protocol metric selects among multiple routes learned by the same routing process. However, it does not most directly satisfy the requirement in this scenario: use the routing protocol identified in the objective as EIGRP.

C: A shared virtual address represents a redundant gateway/service rather than one physical node. However, it does not most directly satisfy the requirement in this scenario: use the routing protocol identified in the objective as EIGRP.

D: EIGRP is an advanced distance-vector routing protocol commonly associated with Cisco environments. This directly satisfies the requirement: use the routing protocol identified in the objective as EIGRP.

E: Port address translation lets many inside hosts share one or a small number of public addresses using transport ports. However, it does not most directly satisfy the requirement in this scenario: use the routing protocol identified in the objective as EIGRP.

Learning point: Use EIGRP when the key requirement is to use the routing protocol identified in the objective as EIGRP.

Question 4

Contoso Health is updating its network standard. Which option best meets the need to use an open link-state IGP for dynamic enterprise routing? The decision applies to a remote-site migration.

1. OSPF
2. Virtual IP (VIP)
3. BGP
4. NAT
5. Longest-prefix match

Correct answer: A

Why: OSPF is a link-state interior gateway protocol that calculates shortest paths within an autonomous system. This directly satisfies the requirement: use an open link-state IGP for dynamic enterprise routing.

Option review:

A: OSPF is a link-state interior gateway protocol that calculates shortest paths within an autonomous system. This directly satisfies the requirement: use an open link-state IGP for dynamic enterprise routing.

B: A shared virtual address represents a redundant gateway/service rather than one physical node. However, it does not most directly satisfy the requirement in this scenario: use an open link-state IGP for dynamic enterprise routing.

C: BGP is a path-vector protocol used primarily for routing between autonomous systems and policy-based internet routing. However, it does not most directly satisfy the requirement in this scenario: use an open link-state IGP for dynamic enterprise routing.

D: Network address translation changes IP addresses between address domains. However, it does not most directly satisfy the requirement in this scenario: use an open link-state IGP for dynamic enterprise routing.

E: Routers prefer the route with the most specific matching prefix length. However, it does not most directly satisfy the requirement in this scenario: use an open link-state IGP for dynamic enterprise routing.

Learning point: Use OSPF when the key requirement is to use an open link-state IGP for dynamic enterprise routing.

Question 5

A field technician at Litware Manufacturing is validating a proposed solution. The design must choose between overlapping routes where one prefix is more specific. Which answer is most appropriate? The decision applies to a operations lab.

1. EIGRP
2. FHRP
3. Virtual IP (VIP)
4. Longest-prefix match
5. OSPF

Correct answer: D

Why: Routers prefer the route with the most specific matching prefix length. This directly satisfies the requirement: choose between overlapping routes where one prefix is more specific.

Option review:

A: EIGRP is an advanced distance-vector routing protocol commonly associated with Cisco environments. However, it does not most directly satisfy the requirement in this scenario: choose between overlapping routes where one prefix is more specific.

B: A first-hop redundancy protocol provides resilient default-gateway service across multiple routers. However, it does not most directly satisfy the requirement in this scenario: choose between overlapping routes where one prefix is more specific.

C: A shared virtual address represents a redundant gateway/service rather than one physical node. However, it does not most directly satisfy the requirement in this scenario: choose between overlapping routes where one prefix is more specific.

D: Routers prefer the route with the most specific matching prefix length. This directly satisfies the requirement: choose between overlapping routes where one prefix is more specific.

E: OSPF is a link-state interior gateway protocol that calculates shortest paths within an autonomous system. However, it does not most directly satisfy the requirement in this scenario: choose between overlapping routes where one prefix is more specific.

Learning point: Use Longest-prefix match when the key requirement is to choose between overlapping routes where one prefix is more specific.

Question 6

For a new deployment at Woodgrove Bank, the networking team wants to choose between otherwise matching routes learned from different routing sources. Which choice most directly satisfies the goal? The decision applies to a production maintenance window.

1. OSPF
2. Longest-prefix match
3. Administrative distance
4. PAT
5. EIGRP

Correct answer: C

Why: Administrative distance ranks trustworthiness of routes learned from different sources/protocols on a router. This directly satisfies the requirement: choose between otherwise matching routes learned from different routing sources.

Option review:

A: OSPF is a link-state interior gateway protocol that calculates shortest paths within an autonomous system. However, it does not most directly satisfy the requirement in this scenario: choose between otherwise matching routes learned from different routing sources.

B: Routers prefer the route with the most specific matching prefix length. However, it does not most directly satisfy the requirement in this scenario: choose between otherwise matching routes learned from different routing sources.

C: Administrative distance ranks trustworthiness of routes learned from different sources/protocols on a router. This directly satisfies the requirement: choose between otherwise matching routes learned from different routing sources.

D: Port address translation lets many inside hosts share one or a small number of public addresses using transport ports. However, it does not most directly satisfy the requirement in this scenario: choose between otherwise matching routes learned from different routing sources.

E: EIGRP is an advanced distance-vector routing protocol commonly associated with Cisco environments. However, it does not most directly satisfy the requirement in this scenario: choose between otherwise matching routes learned from different routing sources.

Learning point: Use Administrative distance when the key requirement is to choose between otherwise matching routes learned from different routing sources.

Question 7

At Blue Yonder Airlines, a systems administrator is reviewing a network change. The requirement is to choose the best path among candidate routes from the same dynamic protocol. Which option is the best fit? The decision applies to a new floor deployment.

1. Routing metric
2. Router subinterface
3. Virtual IP (VIP)
4. Longest-prefix match
5. NAT

Correct answer: A

Why: A routing protocol metric selects among multiple routes learned by the same routing process. This directly satisfies the requirement: choose the best path among candidate routes from the same dynamic protocol.

Option review:

A: A routing protocol metric selects among multiple routes learned by the same routing process. This directly satisfies the requirement: choose the best path among candidate routes from the same dynamic protocol.

B: A logical interface on one physical router port can terminate separate VLANs using tagging. However, it does not most directly satisfy the requirement in this scenario: choose the best path among candidate routes from the same dynamic protocol.

C: A shared virtual address represents a redundant gateway/service rather than one physical node. However, it does not most directly satisfy the requirement in this scenario: choose the best path among candidate routes from the same dynamic protocol.

D: Routers prefer the route with the most specific matching prefix length. However, it does not most directly satisfy the requirement in this scenario: choose the best path among candidate routes from the same dynamic protocol.

E: Network address translation changes IP addresses between address domains. However, it does not most directly satisfy the requirement in this scenario: choose the best path among candidate routes from the same dynamic protocol.

Learning point: Use Routing metric when the key requirement is to choose the best path among candidate routes from the same dynamic protocol.

Question 8

A ticket at Contoso Health says the team must translate one IP address space to another. Which technology or concept most directly addresses this requirement? The decision applies to a service-recovery review.

1. BGP
2. Routing metric
3. NAT
4. Virtual IP (VIP)
5. OSPF

Correct answer: C

Why: Network address translation changes IP addresses between address domains. This directly satisfies the requirement: translate one IP address space to another.

Option review:

A: BGP is a path-vector protocol used primarily for routing between autonomous systems and policy-based internet routing. However, it does not most directly satisfy the requirement in this scenario: translate one IP address space to another.

B: A routing protocol metric selects among multiple routes learned by the same routing process. However, it does not most directly satisfy the requirement in this scenario: translate one IP address space to another.

C: Network address translation changes IP addresses between address domains. This directly satisfies the requirement: translate one IP address space to another.

D: A shared virtual address represents a redundant gateway/service rather than one physical node. However, it does not most directly satisfy the requirement in this scenario: translate one IP address space to another.

E: OSPF is a link-state interior gateway protocol that calculates shortest paths within an autonomous system. However, it does not most directly satisfy the requirement in this scenario: translate one IP address space to another.

Learning point: Use NAT when the key requirement is to translate one IP address space to another.

Question 9

During a design meeting at Litware Manufacturing, the junior network administrator needs to allow many private clients to share a single public IPv4 address for outbound sessions. What should be selected? The decision applies to a branch-office rollout.

1. Router subinterface
2. Static route
3. Longest-prefix match
4. Routing metric
5. PAT

Correct answer: E

Why: Port address translation lets many inside hosts share one or a small number of public addresses using transport ports. This directly satisfies the requirement: allow many private clients to share a single public IPv4 address for outbound sessions.

Option review:

A: A logical interface on one physical router port can terminate separate VLANs using tagging. However, it does not most directly satisfy the requirement in this scenario: allow many private clients to share a single public IPv4 address for outbound sessions.

B: A manually configured route is predictable and low-overhead but does not adapt automatically to topology changes. However, it does not most directly satisfy the requirement in this scenario: allow many private clients to share a single public IPv4 address for outbound sessions.

C: Routers prefer the route with the most specific matching prefix length. However, it does not most directly satisfy the requirement in this scenario: allow many private clients to share a single public IPv4 address for outbound sessions.

D: A routing protocol metric selects among multiple routes learned by the same routing process. However, it does not most directly satisfy the requirement in this scenario: allow many private clients to share a single public IPv4 address for outbound sessions.

E: Port address translation lets many inside hosts share one or a small number of public addresses using transport ports. This directly satisfies the requirement: allow many private clients to share a single public IPv4 address for outbound sessions.

Learning point: Use PAT when the key requirement is to allow many private clients to share a single public IPv4 address for outbound sessions.

Question 10

Woodgrove Bank is updating its network standard. Which option best meets the need to avoid a single default-gateway router becoming a point of failure? The decision applies to a campus refresh.

1. NAT
2. Virtual IP (VIP)
3. OSPF
4. PAT
5. FHRP

Correct answer: E

Why: A first-hop redundancy protocol provides resilient default-gateway service across multiple routers. This directly satisfies the requirement: avoid a single default-gateway router becoming a point of failure.

Option review:

A: Network address translation changes IP addresses between address domains. However, it does not most directly satisfy the requirement in this scenario: avoid a single default-gateway router becoming a point of failure.

B: A shared virtual address represents a redundant gateway/service rather than one physical node. However, it does not most directly satisfy the requirement in this scenario: avoid a single default-gateway router becoming a point of failure.

C: OSPF is a link-state interior gateway protocol that calculates shortest paths within an autonomous system. However, it does not most directly satisfy the requirement in this scenario: avoid a single default-gateway router becoming a point of failure.

D: Port address translation lets many inside hosts share one or a small number of public addresses using transport ports. However, it does not most directly satisfy the requirement in this scenario: avoid a single default-gateway router becoming a point of failure.

E: A first-hop redundancy protocol provides resilient default-gateway service across multiple routers. This directly satisfies the requirement: avoid a single default-gateway router becoming a point of failure.

Learning point: Use FHRP when the key requirement is to avoid a single default-gateway router becoming a point of failure.

Question 11

A field technician at Blue Yonder Airlines is validating a proposed solution. The design must present one stable gateway/service address while underlying devices can fail over. Which answer is most appropriate? The decision applies to a data-center segment.

1. Longest-prefix match
2. Static route
3. Virtual IP (VIP)
4. PAT
5. Administrative distance

Correct answer: C

Why: A shared virtual address represents a redundant gateway/service rather than one physical node. This directly satisfies the requirement: present one stable gateway/service address while underlying devices can fail over.

Option review:

A: Routers prefer the route with the most specific matching prefix length. However, it does not most directly satisfy the requirement in this scenario: present one stable gateway/service address while underlying devices can fail over.

B: A manually configured route is predictable and low-overhead but does not adapt automatically to topology changes. However, it does not most directly satisfy the requirement in this scenario: present one stable gateway/service address while underlying devices can fail over.

C: A shared virtual address represents a redundant gateway/service rather than one physical node. This directly satisfies the requirement: present one stable gateway/service address while underlying devices can fail over.

D: Port address translation lets many inside hosts share one or a small number of public addresses using transport ports. However, it does not most directly satisfy the requirement in this scenario: present one stable gateway/service address while underlying devices can fail over.

E: Administrative distance ranks trustworthiness of routes learned from different sources/protocols on a router. However, it does not most directly satisfy the requirement in this scenario: present one stable gateway/service address while underlying devices can fail over.

Learning point: Use Virtual IP (VIP) when the key requirement is to present one stable gateway/service address while underlying devices can fail over.

Question 12

For a new deployment at Contoso Health, the networking team wants to route multiple VLANs through one physical router interface. Which choice most directly satisfies the goal? The decision applies to a remote-site migration.

1. EIGRP
2. Longest-prefix match
3. Router subinterface
4. Static route
5. FHRP

Correct answer: C

Why: A logical interface on one physical router port can terminate separate VLANs using tagging. This directly satisfies the requirement: route multiple VLANs through one physical router interface.

Option review:

A: EIGRP is an advanced distance-vector routing protocol commonly associated with Cisco environments. However, it does not most directly satisfy the requirement in this scenario: route multiple VLANs through one physical router interface.

B: Routers prefer the route with the most specific matching prefix length. However, it does not most directly satisfy the requirement in this scenario: route multiple VLANs through one physical router interface.

C: A logical interface on one physical router port can terminate separate VLANs using tagging. This directly satisfies the requirement: route multiple VLANs through one physical router interface.

D: A manually configured route is predictable and low-overhead but does not adapt automatically to topology changes. However, it does not most directly satisfy the requirement in this scenario: route multiple VLANs through one physical router interface.

E: A first-hop redundancy protocol provides resilient default-gateway service across multiple routers. However, it does not most directly satisfy the requirement in this scenario: route multiple VLANs through one physical router interface.

Learning point: Use Router subinterface when the key requirement is to route multiple VLANs through one physical router interface.

Question 13

During a service-recovery review, Litware Manufacturing is comparing several networking concepts. Which option is accurately characterized by this statement: A manually configured route is predictable and low-overhead but does not adapt automatically to topology changes.

1. OSPF
2. PAT
3. Routing metric
4. Administrative distance
5. Static route

Correct answer: E

Why: A manually configured route is predictable and low-overhead but does not adapt automatically to topology changes. This directly satisfies the requirement: A manually configured route is predictable and low-overhead but does not adapt automatically to topology changes..

Option review:

A: OSPF is a link-state interior gateway protocol that calculates shortest paths within an autonomous system. However, it does not most directly satisfy the requirement in this scenario: A manually configured route is predictable and low-overhead but does not adapt automatically to topology changes..

B: Port address translation lets many inside hosts share one or a small number of public addresses using transport ports. However, it does not most directly satisfy the requirement in this scenario: A manually configured route is predictable and low-overhead but does not adapt automatically to topology changes..

C: A routing protocol metric selects among multiple routes learned by the same routing process. However, it does not most directly satisfy the requirement in this scenario: A manually configured route is predictable and low-overhead but does not adapt automatically to topology changes..

D: Administrative distance ranks trustworthiness of routes learned from different sources/protocols on a router. However, it does not most directly satisfy the requirement in this scenario: A manually configured route is predictable and low-overhead but does not adapt automatically to topology changes..

E: A manually configured route is predictable and low-overhead but does not adapt automatically to topology changes. This directly satisfies the requirement: A manually configured route is predictable and low-overhead but does not adapt automatically to topology changes..

Learning point: Use Static route when the key requirement is to use a fixed route for a stable small network or specific destination.

Question 14

During a branch-office rollout, Woodgrove Bank is comparing several networking concepts. Which option is accurately characterized by this statement: BGP is a path-vector protocol used primarily for routing between autonomous systems and policy-based internet routing.

1. FHRP
2. Static route
3. OSPF
4. BGP
5. NAT

Correct answer: D

Why: BGP is a path-vector protocol used primarily for routing between autonomous systems and policy-based internet routing. This directly satisfies the requirement: BGP is a path-vector protocol used primarily for routing between autonomous systems and policy-based internet routing..

Option review:

A: A first-hop redundancy protocol provides resilient default-gateway service across multiple routers. However, it does not most directly satisfy the requirement in this scenario: BGP is a path-vector protocol used primarily for routing between autonomous systems and policy-based internet routing..

B: A manually configured route is predictable and low-overhead but does not adapt automatically to topology changes. However, it does not most directly satisfy the requirement in this scenario: BGP is a path-vector protocol used primarily for routing between autonomous systems and policy-based internet routing..

C: OSPF is a link-state interior gateway protocol that calculates shortest paths within an autonomous system. However, it does not most directly satisfy the requirement in this scenario: BGP is a path-vector protocol used primarily for routing between autonomous systems and policy-based internet routing..

D: BGP is a path-vector protocol used primarily for routing between autonomous systems and policy-based internet routing. This directly satisfies the requirement: BGP is a path-vector protocol used primarily for routing between autonomous systems and policy-based internet routing..

E: Network address translation changes IP addresses between address domains. However, it does not most directly satisfy the requirement in this scenario: BGP is a path-vector protocol used primarily for routing between autonomous systems and policy-based internet routing..

Learning point: Use BGP when the key requirement is to exchange routes between autonomous systems or with an internet provider.

Question 15

During a campus refresh, Blue Yonder Airlines is comparing several networking concepts. Which option is accurately characterized by this statement: EIGRP is an advanced distance-vector routing protocol commonly associated with Cisco environments.

1. EIGRP
2. Static route
3. Router subinterface
4. FHRP
5. OSPF

Correct answer: A

Why: EIGRP is an advanced distance-vector routing protocol commonly associated with Cisco environments. This directly satisfies the requirement: EIGRP is an advanced distance-vector routing protocol commonly associated with Cisco environments..

Option review:

A: EIGRP is an advanced distance-vector routing protocol commonly associated with Cisco environments. This directly satisfies the requirement: EIGRP is an advanced distance-vector routing protocol commonly associated with Cisco environments..

B: A manually configured route is predictable and low-overhead but does not adapt automatically to topology changes. However, it does not most directly satisfy the requirement in this scenario: EIGRP is an advanced distance-vector routing protocol commonly associated with Cisco environments..

C: A logical interface on one physical router port can terminate separate VLANs using tagging. However, it does not most directly satisfy the requirement in this scenario: EIGRP is an advanced distance-vector routing protocol commonly associated with Cisco environments..

D: A first-hop redundancy protocol provides resilient default-gateway service across multiple routers. However, it does not most directly satisfy the requirement in this scenario: EIGRP is an advanced distance-vector routing protocol commonly associated with Cisco environments..

E: OSPF is a link-state interior gateway protocol that calculates shortest paths within an autonomous system. However, it does not most directly satisfy the requirement in this scenario: EIGRP is an advanced distance-vector routing protocol commonly associated with Cisco environments..

Learning point: Use EIGRP when the key requirement is to use the routing protocol identified in the objective as EIGRP.

Question 16

During a data-center segment, Contoso Health is comparing several networking concepts. Which option is accurately characterized by this statement: OSPF is a link-state interior gateway protocol that calculates shortest paths within an autonomous system.

1. Router subinterface
2. Static route
3. Routing metric
4. Administrative distance
5. OSPF

Correct answer: E

Why: OSPF is a link-state interior gateway protocol that calculates shortest paths within an autonomous system. This directly satisfies the requirement: OSPF is a link-state interior gateway protocol that calculates shortest paths within an autonomous system..

Option review:

A: A logical interface on one physical router port can terminate separate VLANs using tagging. However, it does not most directly satisfy the requirement in this scenario: OSPF is a link-state interior gateway protocol that calculates shortest paths within an autonomous system..

B: A manually configured route is predictable and low-overhead but does not adapt automatically to topology changes. However, it does not most directly satisfy the requirement in this scenario: OSPF is a link-state interior gateway protocol that calculates shortest paths within an autonomous system..

C: A routing protocol metric selects among multiple routes learned by the same routing process. However, it does not most directly satisfy the requirement in this scenario: OSPF is a link-state interior gateway protocol that calculates shortest paths within an autonomous system..

D: Administrative distance ranks trustworthiness of routes learned from different sources/protocols on a router. However, it does not most directly satisfy the requirement in this scenario: OSPF is a link-state interior gateway protocol that calculates shortest paths within an autonomous system..

E: OSPF is a link-state interior gateway protocol that calculates shortest paths within an autonomous system. This directly satisfies the requirement: OSPF is a link-state interior gateway protocol that calculates shortest paths within an autonomous system..

Learning point: Use OSPF when the key requirement is to use an open link-state IGP for dynamic enterprise routing.

Question 17

During a remote-site migration, Litware Manufacturing is comparing several networking concepts. Which option is accurately characterized by this statement: Routers prefer the route with the most specific matching prefix length.

1. EIGRP
2. Longest-prefix match
3. Virtual IP (VIP)
4. BGP
5. Router subinterface

Correct answer: B

Why: Routers prefer the route with the most specific matching prefix length. This directly satisfies the requirement: Routers prefer the route with the most specific matching prefix length..

Option review:

A: EIGRP is an advanced distance-vector routing protocol commonly associated with Cisco environments. However, it does not most directly satisfy the requirement in this scenario: Routers prefer the route with the most specific matching prefix length..

B: Routers prefer the route with the most specific matching prefix length. This directly satisfies the requirement: Routers prefer the route with the most specific matching prefix length..

C: A shared virtual address represents a redundant gateway/service rather than one physical node. However, it does not most directly satisfy the requirement in this scenario: Routers prefer the route with the most specific matching prefix length..

D: BGP is a path-vector protocol used primarily for routing between autonomous systems and policy-based internet routing. However, it does not most directly satisfy the requirement in this scenario: Routers prefer the route with the most specific matching prefix length..

E: A logical interface on one physical router port can terminate separate VLANs using tagging. However, it does not most directly satisfy the requirement in this scenario: Routers prefer the route with the most specific matching prefix length..

Learning point: Use Longest-prefix match when the key requirement is to choose between overlapping routes where one prefix is more specific.

Question 18

During a operations lab, Woodgrove Bank is comparing several networking concepts. Which option is accurately characterized by this statement: Administrative distance ranks trustworthiness of routes learned from different sources/protocols on a router.

1. NAT
2. Administrative distance
3. Routing metric
4. Static route
5. Router subinterface

Correct answer: B

Why: Administrative distance ranks trustworthiness of routes learned from different sources/protocols on a router. This directly satisfies the requirement: Administrative distance ranks trustworthiness of routes learned from different sources/protocols on a router..

Option review:

A: Network address translation changes IP addresses between address domains. However, it does not most directly satisfy the requirement in this scenario: Administrative distance ranks trustworthiness of routes learned from different sources/protocols on a router..

B: Administrative distance ranks trustworthiness of routes learned from different sources/protocols on a router. This directly satisfies the requirement: Administrative distance ranks trustworthiness of routes learned from different sources/protocols on a router..

C: A routing protocol metric selects among multiple routes learned by the same routing process. However, it does not most directly satisfy the requirement in this scenario: Administrative distance ranks trustworthiness of routes learned from different sources/protocols on a router..

D: A manually configured route is predictable and low-overhead but does not adapt automatically to topology changes. However, it does not most directly satisfy the requirement in this scenario: Administrative distance ranks trustworthiness of routes learned from different sources/protocols on a router..

E: A logical interface on one physical router port can terminate separate VLANs using tagging. However, it does not most directly satisfy the requirement in this scenario: Administrative distance ranks trustworthiness of routes learned from different sources/protocols on a router..

Learning point: Use Administrative distance when the key requirement is to choose between otherwise matching routes learned from different routing sources.

Question 19

During a production maintenance window, Blue Yonder Airlines is comparing several networking concepts. Which option is accurately characterized by this statement: A routing protocol metric selects among multiple routes learned by the same routing process.

1. Routing metric
2. Administrative distance
3. FHRP
4. BGP
5. OSPF

Correct answer: A

Why: A routing protocol metric selects among multiple routes learned by the same routing process. This directly satisfies the requirement: A routing protocol metric selects among multiple routes learned by the same routing process..

Option review:

A: A routing protocol metric selects among multiple routes learned by the same routing process. This directly satisfies the requirement: A routing protocol metric selects among multiple routes learned by the same routing process..

B: Administrative distance ranks trustworthiness of routes learned from different sources/protocols on a router. However, it does not most directly satisfy the requirement in this scenario: A routing protocol metric selects among multiple routes learned by the same routing process..

C: A first-hop redundancy protocol provides resilient default-gateway service across multiple routers. However, it does not most directly satisfy the requirement in this scenario: A routing protocol metric selects among multiple routes learned by the same routing process..

D: BGP is a path-vector protocol used primarily for routing between autonomous systems and policy-based internet routing. However, it does not most directly satisfy the requirement in this scenario: A routing protocol metric selects among multiple routes learned by the same routing process..

E: OSPF is a link-state interior gateway protocol that calculates shortest paths within an autonomous system. However, it does not most directly satisfy the requirement in this scenario: A routing protocol metric selects among multiple routes learned by the same routing process..

Learning point: Use Routing metric when the key requirement is to choose the best path among candidate routes from the same dynamic protocol.

Question 20

During a new floor deployment, Contoso Health is comparing several networking concepts. Which option is accurately characterized by this statement: Network address translation changes IP addresses between address domains.

1. OSPF
2. NAT
3. Virtual IP (VIP)
4. Static route
5. Router subinterface

Correct answer: B

Why: Network address translation changes IP addresses between address domains. This directly satisfies the requirement: Network address translation changes IP addresses between address domains..

Option review:

A: OSPF is a link-state interior gateway protocol that calculates shortest paths within an autonomous system. However, it does not most directly satisfy the requirement in this scenario: Network address translation changes IP addresses between address domains..

B: Network address translation changes IP addresses between address domains. This directly satisfies the requirement: Network address translation changes IP addresses between address domains..

C: A shared virtual address represents a redundant gateway/service rather than one physical node. However, it does not most directly satisfy the requirement in this scenario: Network address translation changes IP addresses between address domains..

D: A manually configured route is predictable and low-overhead but does not adapt automatically to topology changes. However, it does not most directly satisfy the requirement in this scenario: Network address translation changes IP addresses between address domains..

E: A logical interface on one physical router port can terminate separate VLANs using tagging. However, it does not most directly satisfy the requirement in this scenario: Network address translation changes IP addresses between address domains..

Learning point: Use NAT when the key requirement is to translate one IP address space to another.

Question 21

During a service-recovery review, Litware Manufacturing is comparing several networking concepts. Which option is accurately characterized by this statement: Port address translation lets many inside hosts share one or a small number of public addresses using transport ports.

1. PAT
2. NAT
3. BGP
4. Static route
5. OSPF

Correct answer: A

Why: Port address translation lets many inside hosts share one or a small number of public addresses using transport ports. This directly satisfies the requirement: Port address translation lets many inside hosts share one or a small number of public addresses using transport ports..

Option review:

A: Port address translation lets many inside hosts share one or a small number of public addresses using transport ports. This directly satisfies the requirement: Port address translation lets many inside hosts share one or a small number of public addresses using transport ports..

B: Network address translation changes IP addresses between address domains. However, it does not most directly satisfy the requirement in this scenario: Port address translation lets many inside hosts share one or a small number of public addresses using transport ports..

C: BGP is a path-vector protocol used primarily for routing between autonomous systems and policy-based internet routing. However, it does not most directly satisfy the requirement in this scenario: Port address translation lets many inside hosts share one or a small number of public addresses using transport ports..

D: A manually configured route is predictable and low-overhead but does not adapt automatically to topology changes. However, it does not most directly satisfy the requirement in this scenario: Port address translation lets many inside hosts share one or a small number of public addresses using transport ports..

E: OSPF is a link-state interior gateway protocol that calculates shortest paths within an autonomous system. However, it does not most directly satisfy the requirement in this scenario: Port address translation lets many inside hosts share one or a small number of public addresses using transport ports..

Learning point: Use PAT when the key requirement is to allow many private clients to share a single public IPv4 address for outbound sessions.

Question 22

During a branch-office rollout, Woodgrove Bank is comparing several networking concepts. Which option is accurately characterized by this statement: A first-hop redundancy protocol provides resilient default-gateway service across multiple routers.

1. Router subinterface
2. FHRP
3. Administrative distance
4. NAT
5. EIGRP

Correct answer: B

Why: A first-hop redundancy protocol provides resilient default-gateway service across multiple routers. This directly satisfies the requirement: A first-hop redundancy protocol provides resilient default-gateway service across multiple routers..

Option review:

A: A logical interface on one physical router port can terminate separate VLANs using tagging. However, it does not most directly satisfy the requirement in this scenario: A first-hop redundancy protocol provides resilient default-gateway service across multiple routers..

B: A first-hop redundancy protocol provides resilient default-gateway service across multiple routers. This directly satisfies the requirement: A first-hop redundancy protocol provides resilient default-gateway service across multiple routers..

C: Administrative distance ranks trustworthiness of routes learned from different sources/protocols on a router. However, it does not most directly satisfy the requirement in this scenario: A first-hop redundancy protocol provides resilient default-gateway service across multiple routers..

D: Network address translation changes IP addresses between address domains. However, it does not most directly satisfy the requirement in this scenario: A first-hop redundancy protocol provides resilient default-gateway service across multiple routers..

E: EIGRP is an advanced distance-vector routing protocol commonly associated with Cisco environments. However, it does not most directly satisfy the requirement in this scenario: A first-hop redundancy protocol provides resilient default-gateway service across multiple routers..

Learning point: Use FHRP when the key requirement is to avoid a single default-gateway router becoming a point of failure.

Question 23

During a campus refresh, Blue Yonder Airlines is comparing several networking concepts. Which option is accurately characterized by this statement: A shared virtual address represents a redundant gateway/service rather than one physical node.

1. PAT
2. Virtual IP (VIP)
3. Router subinterface
4. Static route
5. OSPF

Correct answer: B

Why: A shared virtual address represents a redundant gateway/service rather than one physical node. This directly satisfies the requirement: A shared virtual address represents a redundant gateway/service rather than one physical node..

Option review:

A: Port address translation lets many inside hosts share one or a small number of public addresses using transport ports. However, it does not most directly satisfy the requirement in this scenario: A shared virtual address represents a redundant gateway/service rather than one physical node..

B: A shared virtual address represents a redundant gateway/service rather than one physical node. This directly satisfies the requirement: A shared virtual address represents a redundant gateway/service rather than one physical node..

C: A logical interface on one physical router port can terminate separate VLANs using tagging. However, it does not most directly satisfy the requirement in this scenario: A shared virtual address represents a redundant gateway/service rather than one physical node..

D: A manually configured route is predictable and low-overhead but does not adapt automatically to topology changes. However, it does not most directly satisfy the requirement in this scenario: A shared virtual address represents a redundant gateway/service rather than one physical node..

E: OSPF is a link-state interior gateway protocol that calculates shortest paths within an autonomous system. However, it does not most directly satisfy the requirement in this scenario: A shared virtual address represents a redundant gateway/service rather than one physical node..

Learning point: Use Virtual IP (VIP) when the key requirement is to present one stable gateway/service address while underlying devices can fail over.

Question 24

During a data-center segment, Contoso Health is comparing several networking concepts. Which option is accurately characterized by this statement: A logical interface on one physical router port can terminate separate VLANs using tagging.

1. FHRP
2. Administrative distance
3. Router subinterface
4. Routing metric
5. OSPF

Correct answer: C

Why: A logical interface on one physical router port can terminate separate VLANs using tagging. This directly satisfies the requirement: A logical interface on one physical router port can terminate separate VLANs using tagging..

Option review:

A: A first-hop redundancy protocol provides resilient default-gateway service across multiple routers. However, it does not most directly satisfy the requirement in this scenario: A logical interface on one physical router port can terminate separate VLANs using tagging..

B: Administrative distance ranks trustworthiness of routes learned from different sources/protocols on a router. However, it does not most directly satisfy the requirement in this scenario: A logical interface on one physical router port can terminate separate VLANs using tagging..

C: A logical interface on one physical router port can terminate separate VLANs using tagging. This directly satisfies the requirement: A logical interface on one physical router port can terminate separate VLANs using tagging..

D: A routing protocol metric selects among multiple routes learned by the same routing process. However, it does not most directly satisfy the requirement in this scenario: A logical interface on one physical router port can terminate separate VLANs using tagging..

E: OSPF is a link-state interior gateway protocol that calculates shortest paths within an autonomous system. However, it does not most directly satisfy the requirement in this scenario: A logical interface on one physical router port can terminate separate VLANs using tagging..

Learning point: Use Router subinterface when the key requirement is to route multiple VLANs through one physical router interface.

Question 25

A systems administrator at Litware Manufacturing is troubleshooting a new floor deployment. The team has isolated the key need as follows: use a fixed route for a stable small network or specific destination. Which concept should be applied or investigated first?

1. PAT
2. Longest-prefix match
3. EIGRP
4. Static route
5. Virtual IP (VIP)

Correct answer: D

Why: A manually configured route is predictable and low-overhead but does not adapt automatically to topology changes. This directly satisfies the requirement: use a fixed route for a stable small network or specific destination.

Option review:

A: Port address translation lets many inside hosts share one or a small number of public addresses using transport ports. However, it does not most directly satisfy the requirement in this scenario: use a fixed route for a stable small network or specific destination.

B: Routers prefer the route with the most specific matching prefix length. However, it does not most directly satisfy the requirement in this scenario: use a fixed route for a stable small network or specific destination.

C: EIGRP is an advanced distance-vector routing protocol commonly associated with Cisco environments. However, it does not most directly satisfy the requirement in this scenario: use a fixed route for a stable small network or specific destination.

D: A manually configured route is predictable and low-overhead but does not adapt automatically to topology changes. This directly satisfies the requirement: use a fixed route for a stable small network or specific destination.

E: A shared virtual address represents a redundant gateway/service rather than one physical node. However, it does not most directly satisfy the requirement in this scenario: use a fixed route for a stable small network or specific destination.

Learning point: Use Static route when the key requirement is to use a fixed route for a stable small network or specific destination.