101 · Question #536

101 Question #536: Real Exam Question with Answer & Explanation

The correct answer is C: Web-based email. Web-based email requires session persistence in a load-balanced environment because the application maintains authenticated session state that must be consistently routed to the same server.

Question

In a load balanced scenario which service would require persistence to function correctly?

Options

ASimple Mail Transport Protocol
BDNS
CWeb-based email
DHTTP

Explanation

Web-based email requires session persistence in a load-balanced environment because the application maintains authenticated session state that must be consistently routed to the same server.

Common mistakes.

A. SMTP is a stateless, transaction-based protocol where each message delivery is a self-contained exchange that does not require affinity to a specific server.
B. DNS uses short-lived, stateless UDP queries where each resolution request is independent and persistence provides no functional benefit.
D. Standard HTTP is a stateless protocol by design, and basic HTTP content delivery does not inherently require session persistence to function correctly.

Concept tested. Load balancer session persistence requirements

Reference. https://techdocs.f5.com/en-us/bigip-15-1-0/big-ip-local-traffic-management-profiles-reference/persistence-profile-reference.html

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