F5-CTS-LTM BIG-IP Local Traffic Manager Practice Question
Exhibit
ltm persistence cookie cookie_persist {
defaults-from cookie
cookie-name BIGIP_persistence
expiration 0
match-across-services enabled
}
ltm virtual vs_http {
pool pool_http
profiles { http { } }
persist { cookie_persist { } }
}Refer to the exhibit. An LTM Specialist wants to ensure that persistence is maintained even if a client switches between different virtual services that share the same pool members. Based on the configuration, will this work?
⚠ Common exam trap
Candidates often assume persistence is strictly bound to a single virtual server, failing to notice the 'match-across-services' setting that allows sharing persistence records across multiple virtual servers.
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
✓
Yes, because 'match-across-services' is enabled.
The persistence profile has 'match-across-services' enabled. This setting allows the BIG-IP to maintain the same persistence record across different virtual servers that share the same pool. This is crucial for complex applications where a user might initiate a session on one virtual service and be directed to another, as it ensures session affinity remains consistent throughout the user's entire journey across the application.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Yes, because 'match-across-services' is enabled.
Why this is correct
The 'match-across-services' setting is specifically designed to allow persistence records to be shared across multiple virtual servers. By enabling this, the BIG-IP links the session to the pool member regardless of which virtual service the client hits, ensuring seamless session continuity across different parts of the application.
- ✗
No, because the cookie name must be unique per virtual server.
Why it's wrong here
Cookie names do not need to be unique per virtual server when using 'match-across-services'. In fact, using the same cookie name is often necessary so that the client's browser sends the same persistence cookie back to the BIG-IP regardless of the specific virtual server being accessed by the client.
- ✗
No, because 'expiration 0' prevents persistence across services.
Why it's wrong here
An expiration of zero indicates session-based persistence, which lasts for the duration of the browser session. This is a common and valid setting for cookie persistence. It does not conflict with the 'match-across-services' setting and does not prevent the sharing of persistence records between different virtual services.
- ✗
Yes, but only if the virtual servers share the same IP address.
Why it's wrong here
The IP address of the virtual server does not influence the 'match-across-services' setting. Persistence records are tracked based on the pool and the persistence profile configuration. As long as the virtual servers point to the same pool and use the same persistence profile, the persistence will be matched correctly.
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
This F5-CTS-LTM practice question is part of Courseiva's free F5 certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the F5-CTS-LTM exam.