F5
101 · Question #294
101 Question #294: Real Exam Question with Answer & Explanation
The correct answer is C: GTM sends subsequent queries to the next preferred data center.. When GTM's recommended data center becomes unavailable, GTM automatically sends subsequent DNS queries to the next preferred data center based on its load balancing configuration and health monitoring.
Question
What happens when the data center that GTM recommends for a client is unavailable?
Options
- AGTM uses cached information to determine an alternate route.
- BGTM queries the local DNS server.
- CGTM sends subsequent queries to the next preferred data center.
- DGTM directs the client to use its DNS cache to select an alternate location.
- EThe client continues to attempt to access the preferred data center.
Explanation
When GTM's recommended data center becomes unavailable, GTM automatically sends subsequent DNS queries to the next preferred data center based on its load balancing configuration and health monitoring.
Common mistakes.
- A. GTM does not fall back to cached routing information - it uses real-time health monitoring data and its live pool configuration to actively select the next available resource.
- B. GTM does not query the local DNS server to find an alternate route - the failover decision is made internally by GTM based on its own pool member health states and load balancing logic.
- D. GTM does not instruct clients to consult their own DNS cache - GTM itself responds with a fresh DNS answer resolving to an available data center's IP address.
- E. The client does not persist in attempting the unavailable data center because GTM resolves the issue at the DNS layer by returning a different IP address for a healthy data center.
Concept tested. GTM data center failover via health monitoring
Community Discussion
No community discussion yet for this question.