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101 · Question #323

Match each persistence method with the correct statement describing it:

The correct answer is B. Source address persistence. Source address persistence routes all connections from a given client IP to the same pool member, relying solely on the network-layer source address with no application-layer inspection.

Section 3: Load Balancing and High Availability Basics

Question

Match each persistence method with the correct statement describing it:

Options

  • ACookie persistence
  • BSource address persistence
  • CSSL persistence
  • DUniversal persistence

How the community answered

(51 responses)
  • A
    6% (3)
  • B
    90% (46)
  • C
    2% (1)
  • D
    2% (1)

Why each option

Source address persistence routes all connections from a given client IP to the same pool member, relying solely on the network-layer source address with no application-layer inspection.

ACookie persistence

Cookie persistence inserts or reads an HTTP Set-Cookie header to identify client sessions, which requires HTTP-layer inspection and does not function for non-HTTP protocols or when clients block cookies.

BSource address persistenceCorrect

Source address persistence uses the client's source IP address as the session key, requiring only IP header inspection to maintain stickiness - it is the simplest persistence type, has no dependency on cookies or SSL state, and is often used when clients cannot accept cookies or when the application is non-HTTP.

CSSL persistence

SSL persistence extracts the SSL/TLS session ID from the handshake to maintain affinity, requiring the BIG-IP to inspect the TLS layer rather than simply reading the IP header.

DUniversal persistence

Universal persistence relies on a user-written iRule to define a custom data element as the persistence key, requiring scripted logic and is not a built-in automatic mechanism.

Concept tested: F5 LTM session persistence methods comparison

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

Topics

#session persistence#source address persistence#cookie persistence#SSL persistence

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