F5
101 · Question #192
101 Question #192: Real Exam Question with Answer & Explanation
The correct answer is C: Observed. When client interactions vary significantly and affect server performance, the Observed load balancing method dynamically tracks both connection counts and response times to distribute traffic evenly.
Question
A site has six members in a pool. All of the servers have been designed, built, and configured with the same applications. It is known that each client's interactions vary significantly and can affect the performance of the servers. If traffic should be sent to all members on a regular basis, which loadbalancing mode is most effective if the goal is to maintain a relatively even load across all servers.
Options
- ARatio
- BPriority
- CObserved
- DRound Robin
Explanation
When client interactions vary significantly and affect server performance, the Observed load balancing method dynamically tracks both connection counts and response times to distribute traffic evenly.
Common mistakes.
- A. Ratio uses administrator-defined static weights to distribute traffic, so it cannot adapt dynamically when server performance fluctuates due to varying client interactions.
- B. Priority groups members and directs all traffic to the highest-priority group until a threshold is reached, which does not distribute traffic regularly across all members as required.
- D. Round Robin distributes new connections sequentially in equal turns regardless of current server load or response time, resulting in uneven effective load when sessions have significantly different resource costs.
Concept tested. F5 BIG-IP Observed dynamic load balancing method
Reference. https://support.f5.com/csp/article/K13710
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