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101 · Question #540
101 Question #540: Real Exam Question with Answer & Explanation
The correct answer is A: Ensuring requests from a single source always end up being handled by the same server.. In load balancing, persistence (also called sticky sessions) ensures all requests from a given client are consistently routed to the same backend server for the duration of a session.
Question
In the context of load balancing, what does the term persistence refer to?
Options
- AEnsuring requests from a single source always end up being handled by the same server.
- Bthe ability to associate different HTTP requests to a single user so that activity can be tracked.
- CKeeping TLS session key information in memory so sessions can be quickly resumed
- Dthe ability to keep idle connections open as long as possible by sending dummy traffic
Explanation
In load balancing, persistence (also called sticky sessions) ensures all requests from a given client are consistently routed to the same backend server for the duration of a session.
Common mistakes.
- B. Associating multiple HTTP requests to a single user for activity tracking describes application-layer session management, not the load balancing concept of persistence.
- C. Storing TLS session keys to enable faster resumption describes TLS session caching, which is a separate SSL/TLS optimization unrelated to load balancer routing decisions.
- D. Sending dummy traffic to keep idle connections open describes TCP or HTTP keepalive behavior, not load balancer persistence.
Concept tested. Load balancer session persistence and sticky sessions
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