Microsoft AZ-104 Azure Load Balancer Practice Test

 

Topic 17 focuses on Azure Load Balancer and Load-Balancing Troubleshooting for the Microsoft Certified: Azure Administrator Associate certification and the AZ-104 exam, using Microsoft Azure administration scenarios. For broader exam preparation, review the Microsoft Azure Administrator AZ-104 Exam Dumps page. Each question includes a concise explanation of the correct answer and the technical reason the other choices are incorrect.

Question 1

To distribute internet-originated TCP or UDP traffic across backend instances, which Azure configuration should be selected?

1. Public Azure Load Balancer
2. HA Ports rule
3. Outbound rule
4. Layer 4 load balancing

Correct Answer: A

 

Correct Answer

Answer A is correct because Public Azure Load Balancer is a Layer 4 load balancer with a public frontend IP address. It directly supports the requirement to distribute internet-originated TCP or UDP traffic across backend instances.

Incorrect Answers

Answer B is incorrect because HA Ports rule is used to support network virtual appliances and other high-availability scenarios that need all-port load balancing; it does not provide the capability described in the scenario.

Answer C is incorrect because Outbound rule is used to provide explicit outbound internet connectivity behavior for backend instances; it does not provide the capability described in the scenario.

Answer D is incorrect because Layer 4 load balancing is used to balance non-HTTP and HTTP workloads without application-layer routing decisions; it does not provide the capability described in the scenario.

 

Question 2

For Public Azure Load Balancer, which administrative outcome is expected?

1. Balance non-HTTP and HTTP workloads without application-layer routing decisions
2. Distribute internet-originated TCP or UDP traffic across backend instances
3. Stop directing new traffic to an unhealthy backend while it fails the probe
4. Distribute private network traffic across backend instances without exposing a public frontend

Correct Answer: B

 

Correct Answer

Answer B is correct because Public Azure Load Balancer is a Layer 4 load balancer with a public frontend IP address. Its intended administrative use is to distribute internet-originated TCP or UDP traffic across backend instances.

Incorrect Answers

Answer A is incorrect because that outcome belongs to Layer 4 load balancing, which is used to balance non-HTTP and HTTP workloads without application-layer routing decisions; it is not the primary purpose of Public Azure Load Balancer.

Answer C is incorrect because that outcome belongs to Health probe, which is used to stop directing new traffic to an unhealthy backend while it fails the probe; it is not the primary purpose of Public Azure Load Balancer.

Answer D is incorrect because that outcome belongs to Internal Azure Load Balancer, which is used to distribute private network traffic across backend instances without exposing a public frontend; it is not the primary purpose of Public Azure Load Balancer.

 

Question 3

To distribute private network traffic across backend instances without exposing a public frontend, which Azure configuration should be selected?

1. Inbound NAT rule
2. Backend pool
3. Internal Azure Load Balancer
4. HA Ports rule

Correct Answer: C

 

Correct Answer

Answer C is correct because Internal Azure Load Balancer is a Layer 4 load balancer with a private frontend IP address. It directly supports the requirement to distribute private network traffic across backend instances without exposing a public frontend.

Incorrect Answers

Answer A is incorrect because Inbound NAT rule is used to provide direct administrative or service access to one backend instance through the load balancer frontend; it does not provide the capability described in the scenario.

Answer B is incorrect because Backend pool is used to define the set of service instances eligible to handle requests; it does not provide the capability described in the scenario.

Answer D is incorrect because HA Ports rule is used to support network virtual appliances and other high-availability scenarios that need all-port load balancing; it does not provide the capability described in the scenario.

 

Question 4

For Internal Azure Load Balancer, which administrative outcome is expected?

1. Distribute internet-originated TCP or UDP traffic across backend instances
2. Provide explicit outbound internet connectivity behavior for backend instances
3. Define how incoming flows are distributed to healthy backend endpoints
4. Distribute private network traffic across backend instances without exposing a public frontend

Correct Answer: D

 

Correct Answer

Answer D is correct because Internal Azure Load Balancer is a Layer 4 load balancer with a private frontend IP address. Its intended administrative use is to distribute private network traffic across backend instances without exposing a public frontend.

Incorrect Answers

Answer A is incorrect because that outcome belongs to Public Azure Load Balancer, which is used to distribute internet-originated TCP or UDP traffic across backend instances; it is not the primary purpose of Internal Azure Load Balancer.

Answer B is incorrect because that outcome belongs to Outbound rule, which is used to provide explicit outbound internet connectivity behavior for backend instances; it is not the primary purpose of Internal Azure Load Balancer.

Answer C is incorrect because that outcome belongs to Load-balancing rule, which is used to define how incoming flows are distributed to healthy backend endpoints; it is not the primary purpose of Internal Azure Load Balancer.

 

Question 5

To balance non-HTTP and HTTP workloads without application-layer routing decisions, which Azure configuration should be selected?

1. HA Ports rule
2. Probe-based troubleshooting
3. Inbound NAT rule
4. Layer 4 load balancing

Correct Answer: D

 

Correct Answer

Answer D is correct because Layer 4 load balancing is traffic distribution based primarily on transport-layer information such as IP addresses and TCP or UDP ports. It directly supports the requirement to balance non-HTTP and HTTP workloads without application-layer routing decisions.

Incorrect Answers

Answer A is incorrect because HA Ports rule is used to support network virtual appliances and other high-availability scenarios that need all-port load balancing; it does not provide the capability described in the scenario.

Answer B is incorrect because Probe-based troubleshooting is used to isolate why Azure Load Balancer is not sending traffic to expected backend instances; it does not provide the capability described in the scenario.

Answer C is incorrect because Inbound NAT rule is used to provide direct administrative or service access to one backend instance through the load balancer frontend; it does not provide the capability described in the scenario.

 

Question 6

For Layer 4 load balancing, which administrative outcome is expected?

1. Isolate why Azure Load Balancer is not sending traffic to expected backend instances
2. Define how incoming flows are distributed to healthy backend endpoints
3. Provide direct administrative or service access to one backend instance through the load balancer frontend
4. Balance non-HTTP and HTTP workloads without application-layer routing decisions

Correct Answer: D

 

Correct Answer

Answer D is correct because Layer 4 load balancing is traffic distribution based primarily on transport-layer information such as IP addresses and TCP or UDP ports. Its intended administrative use is to balance non-HTTP and HTTP workloads without application-layer routing decisions.

Incorrect Answers

Answer A is incorrect because that outcome belongs to Probe-based troubleshooting, which is used to isolate why Azure Load Balancer is not sending traffic to expected backend instances; it is not the primary purpose of Layer 4 load balancing.

Answer B is incorrect because that outcome belongs to Load-balancing rule, which is used to define how incoming flows are distributed to healthy backend endpoints; it is not the primary purpose of Layer 4 load balancing.

Answer C is incorrect because that outcome belongs to Inbound NAT rule, which is used to provide direct administrative or service access to one backend instance through the load balancer frontend; it is not the primary purpose of Layer 4 load balancing.

 

Question 7

To define where incoming load-balanced traffic enters Azure Load Balancer, which Azure configuration should be selected?

1. Session persistence
2. Frontend IP configuration
3. Public Azure Load Balancer
4. Load-balancing rule

Correct Answer: B

 

Correct Answer

Answer B is correct because Frontend IP configuration is the load-balancer address and subnet or public IP association that clients connect to. It directly supports the requirement to define where incoming load-balanced traffic enters Azure Load Balancer.

Incorrect Answers

Answer A is incorrect because Session persistence is used to support workloads that benefit from client affinity at Layer 4; it does not provide the capability described in the scenario.

Answer C is incorrect because Public Azure Load Balancer is used to distribute internet-originated TCP or UDP traffic across backend instances; it does not provide the capability described in the scenario.

Answer D is incorrect because Load-balancing rule is used to define how incoming flows are distributed to healthy backend endpoints; it does not provide the capability described in the scenario.

 

Question 8

For Frontend IP configuration, which administrative outcome is expected?

1. Isolate why Azure Load Balancer is not sending traffic to expected backend instances
2. Define how incoming flows are distributed to healthy backend endpoints
3. Define where incoming load-balanced traffic enters Azure Load Balancer
4. Distribute internet-originated TCP or UDP traffic across backend instances

Correct Answer: C

 

Correct Answer

Answer C is correct because Frontend IP configuration is the load-balancer address and subnet or public IP association that clients connect to. Its intended administrative use is to define where incoming load-balanced traffic enters Azure Load Balancer.

Incorrect Answers

Answer A is incorrect because that outcome belongs to Probe-based troubleshooting, which is used to isolate why Azure Load Balancer is not sending traffic to expected backend instances; it is not the primary purpose of Frontend IP configuration.

Answer B is incorrect because that outcome belongs to Load-balancing rule, which is used to define how incoming flows are distributed to healthy backend endpoints; it is not the primary purpose of Frontend IP configuration.

Answer D is incorrect because that outcome belongs to Public Azure Load Balancer, which is used to distribute internet-originated TCP or UDP traffic across backend instances; it is not the primary purpose of Frontend IP configuration.

 

Question 9

To define the set of service instances eligible to handle requests, which Azure configuration should be selected?

1. Session persistence
2. Load-balancing rule
3. HA Ports rule
4. Backend pool

Correct Answer: D

 

Correct Answer

Answer D is correct because Backend pool is the collection of virtual machine or other supported backend endpoints that can receive load-balanced traffic. It directly supports the requirement to define the set of service instances eligible to handle requests.

Incorrect Answers

Answer A is incorrect because Session persistence is used to support workloads that benefit from client affinity at Layer 4; it does not provide the capability described in the scenario.

Answer B is incorrect because Load-balancing rule is used to define how incoming flows are distributed to healthy backend endpoints; it does not provide the capability described in the scenario.

Answer C is incorrect because HA Ports rule is used to support network virtual appliances and other high-availability scenarios that need all-port load balancing; it does not provide the capability described in the scenario.

 

Question 10

For Backend pool, which administrative outcome is expected?

1. Support workloads that benefit from client affinity at Layer 4
2. Support network virtual appliances and other high-availability scenarios that need all-port load balancing
3. Define the set of service instances eligible to handle requests
4. Isolate why Azure Load Balancer is not sending traffic to expected backend instances

Correct Answer: C

 

Correct Answer

Answer C is correct because Backend pool is the collection of virtual machine or other supported backend endpoints that can receive load-balanced traffic. Its intended administrative use is to define the set of service instances eligible to handle requests.

Incorrect Answers

Answer A is incorrect because that outcome belongs to Session persistence, which is used to support workloads that benefit from client affinity at Layer 4; it is not the primary purpose of Backend pool.

Answer B is incorrect because that outcome belongs to HA Ports rule, which is used to support network virtual appliances and other high-availability scenarios that need all-port load balancing; it is not the primary purpose of Backend pool.

Answer D is incorrect because that outcome belongs to Probe-based troubleshooting, which is used to isolate why Azure Load Balancer is not sending traffic to expected backend instances; it is not the primary purpose of Backend pool.

 

Question 11

To stop directing new traffic to an unhealthy backend while it fails the probe, which Azure configuration should be selected?

1. Session persistence
2. Load-balancing rule
3. Health probe
4. Public Azure Load Balancer

Correct Answer: C

 

Correct Answer

Answer C is correct because Health probe is a periodic check that determines whether a backend instance is healthy enough to receive new flows. It directly supports the requirement to stop directing new traffic to an unhealthy backend while it fails the probe.

Incorrect Answers

Answer A is incorrect because Session persistence is used to support workloads that benefit from client affinity at Layer 4; it does not provide the capability described in the scenario.

Answer B is incorrect because Load-balancing rule is used to define how incoming flows are distributed to healthy backend endpoints; it does not provide the capability described in the scenario.

Answer D is incorrect because Public Azure Load Balancer is used to distribute internet-originated TCP or UDP traffic across backend instances; it does not provide the capability described in the scenario.

 

Question 12

For Health probe, which administrative outcome is expected?

1. Stop directing new traffic to an unhealthy backend while it fails the probe
2. Isolate why Azure Load Balancer is not sending traffic to expected backend instances
3. Support workloads that benefit from client affinity at Layer 4
4. Provide explicit outbound internet connectivity behavior for backend instances

Correct Answer: A

 

Correct Answer

Answer A is correct because Health probe is a periodic check that determines whether a backend instance is healthy enough to receive new flows. Its intended administrative use is to stop directing new traffic to an unhealthy backend while it fails the probe.

Incorrect Answers

Answer B is incorrect because that outcome belongs to Probe-based troubleshooting, which is used to isolate why Azure Load Balancer is not sending traffic to expected backend instances; it is not the primary purpose of Health probe.

Answer C is incorrect because that outcome belongs to Session persistence, which is used to support workloads that benefit from client affinity at Layer 4; it is not the primary purpose of Health probe.

Answer D is incorrect because that outcome belongs to Outbound rule, which is used to provide explicit outbound internet connectivity behavior for backend instances; it is not the primary purpose of Health probe.

 

Question 13

To define how incoming flows are distributed to healthy backend endpoints, which Azure configuration should be selected?

1. Backend pool
2. Load-balancing rule
3. Inbound NAT rule
4. Frontend IP configuration

Correct Answer: B

 

Correct Answer

Answer B is correct because Load-balancing rule is the configuration that maps a frontend IP and port or protocol to a backend pool and probe. It directly supports the requirement to define how incoming flows are distributed to healthy backend endpoints.

Incorrect Answers

Answer A is incorrect because Backend pool is used to define the set of service instances eligible to handle requests; it does not provide the capability described in the scenario.

Answer C is incorrect because Inbound NAT rule is used to provide direct administrative or service access to one backend instance through the load balancer frontend; it does not provide the capability described in the scenario.

Answer D is incorrect because Frontend IP configuration is used to define where incoming load-balanced traffic enters Azure Load Balancer; it does not provide the capability described in the scenario.

 

Question 14

For Load-balancing rule, which administrative outcome is expected?

1. Support workloads that benefit from client affinity at Layer 4
2. Distribute private network traffic across backend instances without exposing a public frontend
3. Define how incoming flows are distributed to healthy backend endpoints
4. Stop directing new traffic to an unhealthy backend while it fails the probe

Correct Answer: C

 

Correct Answer

Answer C is correct because Load-balancing rule is the configuration that maps a frontend IP and port or protocol to a backend pool and probe. Its intended administrative use is to define how incoming flows are distributed to healthy backend endpoints.

Incorrect Answers

Answer A is incorrect because that outcome belongs to Session persistence, which is used to support workloads that benefit from client affinity at Layer 4; it is not the primary purpose of Load-balancing rule.

Answer B is incorrect because that outcome belongs to Internal Azure Load Balancer, which is used to distribute private network traffic across backend instances without exposing a public frontend; it is not the primary purpose of Load-balancing rule.

Answer D is incorrect because that outcome belongs to Health probe, which is used to stop directing new traffic to an unhealthy backend while it fails the probe; it is not the primary purpose of Load-balancing rule.

 

Question 15

To provide direct administrative or service access to one backend instance through the load balancer frontend, which Azure configuration should be selected?

1. HA Ports rule
2. Backend pool
3. Load-balancing rule
4. Inbound NAT rule

Correct Answer: D

 

Correct Answer

Answer D is correct because Inbound NAT rule is a mapping that sends a specific frontend port to a specific backend instance and port. It directly supports the requirement to provide direct administrative or service access to one backend instance through the load balancer frontend.

Incorrect Answers

Answer A is incorrect because HA Ports rule is used to support network virtual appliances and other high-availability scenarios that need all-port load balancing; it does not provide the capability described in the scenario.

Answer B is incorrect because Backend pool is used to define the set of service instances eligible to handle requests; it does not provide the capability described in the scenario.

Answer C is incorrect because Load-balancing rule is used to define how incoming flows are distributed to healthy backend endpoints; it does not provide the capability described in the scenario.

 

Question 16

For Inbound NAT rule, which administrative outcome is expected?

1. Provide direct administrative or service access to one backend instance through the load balancer frontend
2. Provide explicit outbound internet connectivity behavior for backend instances
3. Support workloads that benefit from client affinity at Layer 4
4. Define how incoming flows are distributed to healthy backend endpoints

Correct Answer: A

 

Correct Answer

Answer A is correct because Inbound NAT rule is a mapping that sends a specific frontend port to a specific backend instance and port. Its intended administrative use is to provide direct administrative or service access to one backend instance through the load balancer frontend.

Incorrect Answers

Answer B is incorrect because that outcome belongs to Outbound rule, which is used to provide explicit outbound internet connectivity behavior for backend instances; it is not the primary purpose of Inbound NAT rule.

Answer C is incorrect because that outcome belongs to Session persistence, which is used to support workloads that benefit from client affinity at Layer 4; it is not the primary purpose of Inbound NAT rule.

Answer D is incorrect because that outcome belongs to Load-balancing rule, which is used to define how incoming flows are distributed to healthy backend endpoints; it is not the primary purpose of Inbound NAT rule.

 

Question 17

To provide explicit outbound internet connectivity behavior for backend instances, which Azure configuration should be selected?

1. Probe-based troubleshooting
2. Outbound rule
3. Inbound NAT rule
4. HA Ports rule

Correct Answer: B

 

Correct Answer

Answer B is correct because Outbound rule is a Standard Load Balancer configuration that controls outbound SNAT behavior for backend pool members. It directly supports the requirement to provide explicit outbound internet connectivity behavior for backend instances.

Incorrect Answers

Answer A is incorrect because Probe-based troubleshooting is used to isolate why Azure Load Balancer is not sending traffic to expected backend instances; it does not provide the capability described in the scenario.

Answer C is incorrect because Inbound NAT rule is used to provide direct administrative or service access to one backend instance through the load balancer frontend; it does not provide the capability described in the scenario.

Answer D is incorrect because HA Ports rule is used to support network virtual appliances and other high-availability scenarios that need all-port load balancing; it does not provide the capability described in the scenario.

 

Question 18

For Outbound rule, which administrative outcome is expected?

1. Distribute internet-originated TCP or UDP traffic across backend instances
2. Provide explicit outbound internet connectivity behavior for backend instances
3. Isolate why Azure Load Balancer is not sending traffic to expected backend instances
4. Define how incoming flows are distributed to healthy backend endpoints

Correct Answer: B

 

Correct Answer

Answer B is correct because Outbound rule is a Standard Load Balancer configuration that controls outbound SNAT behavior for backend pool members. Its intended administrative use is to provide explicit outbound internet connectivity behavior for backend instances.

Incorrect Answers

Answer A is incorrect because that outcome belongs to Public Azure Load Balancer, which is used to distribute internet-originated TCP or UDP traffic across backend instances; it is not the primary purpose of Outbound rule.

Answer C is incorrect because that outcome belongs to Probe-based troubleshooting, which is used to isolate why Azure Load Balancer is not sending traffic to expected backend instances; it is not the primary purpose of Outbound rule.

Answer D is incorrect because that outcome belongs to Load-balancing rule, which is used to define how incoming flows are distributed to healthy backend endpoints; it is not the primary purpose of Outbound rule.

 

Question 19

To support network virtual appliances and other high-availability scenarios that need all-port load balancing, which Azure configuration should be selected?

1. HA Ports rule
2. Outbound rule
3. Session persistence
4. Probe-based troubleshooting

Correct Answer: A

 

Correct Answer

Answer A is correct because HA Ports rule is a load-balancing rule that can distribute all TCP and UDP ports for an internal Standard Load Balancer scenario. It directly supports the requirement to support network virtual appliances and other high-availability scenarios that need all-port load balancing.

Incorrect Answers

Answer B is incorrect because Outbound rule is used to provide explicit outbound internet connectivity behavior for backend instances; it does not provide the capability described in the scenario.

Answer C is incorrect because Session persistence is used to support workloads that benefit from client affinity at Layer 4; it does not provide the capability described in the scenario.

Answer D is incorrect because Probe-based troubleshooting is used to isolate why Azure Load Balancer is not sending traffic to expected backend instances; it does not provide the capability described in the scenario.

 

Question 20

For HA Ports rule, which administrative outcome is expected?

1. Support network virtual appliances and other high-availability scenarios that need all-port load balancing
2. Define how incoming flows are distributed to healthy backend endpoints
3. Distribute internet-originated TCP or UDP traffic across backend instances
4. Support workloads that benefit from client affinity at Layer 4

Correct Answer: A

 

Correct Answer

Answer A is correct because HA Ports rule is a load-balancing rule that can distribute all TCP and UDP ports for an internal Standard Load Balancer scenario. Its intended administrative use is to support network virtual appliances and other high-availability scenarios that need all-port load balancing.

Incorrect Answers

Answer B is incorrect because that outcome belongs to Load-balancing rule, which is used to define how incoming flows are distributed to healthy backend endpoints; it is not the primary purpose of HA Ports rule.

Answer C is incorrect because that outcome belongs to Public Azure Load Balancer, which is used to distribute internet-originated TCP or UDP traffic across backend instances; it is not the primary purpose of HA Ports rule.

Answer D is incorrect because that outcome belongs to Session persistence, which is used to support workloads that benefit from client affinity at Layer 4; it is not the primary purpose of HA Ports rule.

 

Question 21

To support workloads that benefit from client affinity at Layer 4, which Azure configuration should be selected?

1. Inbound NAT rule
2. Session persistence
3. Internal Azure Load Balancer
4. Public Azure Load Balancer

Correct Answer: B

 

Correct Answer

Answer B is correct because Session persistence is the load distribution setting that can keep flows from a client mapped consistently according to source information. It directly supports the requirement to support workloads that benefit from client affinity at Layer 4.

Incorrect Answers

Answer A is incorrect because Inbound NAT rule is used to provide direct administrative or service access to one backend instance through the load balancer frontend; it does not provide the capability described in the scenario.

Answer C is incorrect because Internal Azure Load Balancer is used to distribute private network traffic across backend instances without exposing a public frontend; it does not provide the capability described in the scenario.

Answer D is incorrect because Public Azure Load Balancer is used to distribute internet-originated TCP or UDP traffic across backend instances; it does not provide the capability described in the scenario.

 

Question 22

For Session persistence, which administrative outcome is expected?

1. Balance non-HTTP and HTTP workloads without application-layer routing decisions
2. Provide explicit outbound internet connectivity behavior for backend instances
3. Support workloads that benefit from client affinity at Layer 4
4. Define how incoming flows are distributed to healthy backend endpoints

Correct Answer: C

 

Correct Answer

Answer C is correct because Session persistence is the load distribution setting that can keep flows from a client mapped consistently according to source information. Its intended administrative use is to support workloads that benefit from client affinity at Layer 4.

Incorrect Answers

Answer A is incorrect because that outcome belongs to Layer 4 load balancing, which is used to balance non-HTTP and HTTP workloads without application-layer routing decisions; it is not the primary purpose of Session persistence.

Answer B is incorrect because that outcome belongs to Outbound rule, which is used to provide explicit outbound internet connectivity behavior for backend instances; it is not the primary purpose of Session persistence.

Answer D is incorrect because that outcome belongs to Load-balancing rule, which is used to define how incoming flows are distributed to healthy backend endpoints; it is not the primary purpose of Session persistence.

 

Question 23

To isolate why Azure Load Balancer is not sending traffic to expected backend instances, which Azure configuration should be selected?

1. Probe-based troubleshooting
2. HA Ports rule
3. Outbound rule
4. Session persistence

Correct Answer: A

 

Correct Answer

Answer A is correct because Probe-based troubleshooting is the practice of verifying probe protocol, port, path, NSG rules, guest firewall, and application listening state when backends show unhealthy. It directly supports the requirement to isolate why Azure Load Balancer is not sending traffic to expected backend instances.

Incorrect Answers

Answer B is incorrect because HA Ports rule is used to support network virtual appliances and other high-availability scenarios that need all-port load balancing; it does not provide the capability described in the scenario.

Answer C is incorrect because Outbound rule is used to provide explicit outbound internet connectivity behavior for backend instances; it does not provide the capability described in the scenario.

Answer D is incorrect because Session persistence is used to support workloads that benefit from client affinity at Layer 4; it does not provide the capability described in the scenario.

 

Question 24

For Probe-based troubleshooting, which administrative outcome is expected?

1. Distribute private network traffic across backend instances without exposing a public frontend
2. Support workloads that benefit from client affinity at Layer 4
3. Provide direct administrative or service access to one backend instance through the load balancer frontend
4. Isolate why Azure Load Balancer is not sending traffic to expected backend instances

Correct Answer: D

 

Correct Answer

Answer D is correct because Probe-based troubleshooting is the practice of verifying probe protocol, port, path, NSG rules, guest firewall, and application listening state when backends show unhealthy. Its intended administrative use is to isolate why Azure Load Balancer is not sending traffic to expected backend instances.

Incorrect Answers

Answer A is incorrect because that outcome belongs to Internal Azure Load Balancer, which is used to distribute private network traffic across backend instances without exposing a public frontend; it is not the primary purpose of Probe-based troubleshooting.

Answer B is incorrect because that outcome belongs to Session persistence, which is used to support workloads that benefit from client affinity at Layer 4; it is not the primary purpose of Probe-based troubleshooting.

Answer C is incorrect because that outcome belongs to Inbound NAT rule, which is used to provide direct administrative or service access to one backend instance through the load balancer frontend; it is not the primary purpose of Probe-based troubleshooting.