F5
101 · Question #335
101 Question #335: Real Exam Question with Answer & Explanation
The correct answer is B: On a wide IP object. In F5 GTM (BIG-IP DNS), client persistence is a property configured on the Wide IP object, which controls how DNS responses direct returning clients to previously assigned resources.
Question
Where do you configure GTM client persistence? Case Study Title (Case Study):
Options
- AOn a DNS listener object
- BOn a wide IP object
- CWithin a load balancing method
- DOn a DNS pool object
- EOn a virtual server object
Explanation
In F5 GTM (BIG-IP DNS), client persistence is a property configured on the Wide IP object, which controls how DNS responses direct returning clients to previously assigned resources.
Common mistakes.
- A. A DNS listener object handles reception of incoming DNS queries on a specific IP and port but does not contain persistence configuration.
- C. A load balancing method defines the algorithm for selecting pool members and does not include client persistence settings.
- D. A DNS pool groups virtual servers together for selection but persistence is not configured at the pool level - it is configured at the Wide IP level above it.
- E. Virtual server objects are LTM constructs for Layer 4-7 traffic; they are not the location for GTM DNS-level persistence configuration.
Concept tested. GTM Wide IP client persistence configuration
Reference. https://techdocs.f5.com/en-us/bigip-17-1-0/big-ip-dns-implementations/gtm-wide-ips.html
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