F5-CTS-LTM BIG-IP Local Traffic Manager Practice Question
Which component of the BIG-IP LTM system is responsible for performing health checks on backend servers to determine if they are capable of accepting new connections?
⚠ Common exam trap
Candidates frequently confuse 'Health Monitors' with 'Load Balancing Methods' or 'Persistence Profiles', incorrectly assuming that traffic distribution algorithms are responsible for verifying server health.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The Health Monitor
Health monitors are the LTM component used to periodically verify the status of pool members. By sending specific requests—such as ICMP, TCP, or HTTP—the LTM determines if a server is healthy. If a monitor fails, the LTM marks the member as 'down' and stops sending traffic to it, which is essential for maintaining application availability and preventing users from hitting broken services.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
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The Persistence Profile
Why it's wrong here
Persistence profiles are used to track client sessions and ensure that returning clients are sent to the same pool member. They have no role in monitoring the health of servers; they only dictate the load-balancing logic once a connection has been established and an affinity rule is triggered.
- ✓
The Health Monitor
Why this is correct
Health monitors are specifically designed to poll backend resources. They verify availability by performing active checks. If a check fails, the resource is removed from the pool, ensuring traffic is only routed to responsive servers, which is the primary method for maintaining high availability in LTM.
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The SNAT Automap
Why it's wrong here
SNAT (Secure Network Address Translation) is used to translate the source IP address of client traffic to the LTM's self-IP. It is used for routing and network topology management, not for checking the status or health of the backend servers. It does not influence traffic forwarding decisions based on health.
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The Virtual Server
Why it's wrong here
The virtual server acts as the entry point for client traffic. While it relies on pool member status to function, it does not perform the actual health check itself. The virtual server simply references the pool, and the monitors assigned to that pool handle the server health status reporting.
About these practice questions
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official F5 exam blueprint
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