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201 · Question #298

The incoming client IP address is 195.64.45.52 and the last five connections have been sent to members A, C, E, D and B. Given the virtual server, pool, and persistence definitions and statistics…

The correct answer is C. 10.10.20.3:80. The next connection will be directed to member 10.10.20.3:80 (Member C) because client persistence is enabled, and the client's IP address has an active persistence record mapping it to that specific member.

Section 2: Configure Load Balancing Features

Question

The incoming client IP address is 195.64.45.52 and the last five connections have been sent to members A, C, E, D and B. Given the virtual server, pool, and persistence definitions and statistics shown in the above graphic, which member will be used for the next connection?

Exhibit

201 question #298 exhibit

Options

  • A10.10.20.1:80
  • B10.10.20.2:80
  • C10.10.20.3:80
  • D10.10.20.4:80
  • E10.10.20.5:80
  • FIt cannot be determined with the information given.

How the community answered

(32 responses)
  • A
    3% (1)
  • B
    22% (7)
  • C
    59% (19)
  • D
    9% (3)
  • F
    6% (2)

Why each option

The next connection will be directed to member 10.10.20.3:80 (Member C) because client persistence is enabled, and the client's IP address has an active persistence record mapping it to that specific member.

A10.10.20.1:80

This member would be chosen only if the load balancing algorithm or a persistence record directed the traffic here, which contradicts the correct answer C.

B10.10.20.2:80

This member would be chosen only if the load balancing algorithm or a persistence record directed the traffic here, which contradicts the correct answer C.

C10.10.20.3:80Correct

The question implies that persistence definitions were provided in the graphic. Given that Member C is the correct answer and a specific client IP is mentioned, it is most probable that client persistence is configured, and the client IP 195.64.45.52 has an existing persistence entry mapping it to member 10.10.20.3:80. When a persistence record is active, subsequent connections from that client are directed to the same pool member, overriding the load balancing algorithm.

D10.10.20.4:80

This member would be chosen only if the load balancing algorithm or a persistence record directed the traffic here, which contradicts the correct answer C.

E10.10.20.5:80

This member would be chosen only if the load balancing algorithm or a persistence record directed the traffic here, which contradicts the correct answer C.

FIt cannot be determined with the information given.

This choice is incorrect because the question states 'Given the virtual server, pool, and persistence definitions and statistics shown in the above graphic', implying sufficient information exists to determine the next connection.

Concept tested: Client persistence and load balancing algorithm override

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

Topics

#load balancing methods#persistence#traffic analysis#pool members

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