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F5 Networks F5CAB3 Exam - Topic 1 Question 5 Discussion
Topic #: 1
All pool members are online. All other virtual server settings are at default.
What might alter the load balancing behavior? (Choose one answer)
By default, BIG-IP load balancing algorithms (such as Round Robin) distribute connections evenly across all available pool members. However, persistence profiles override normal load balancing decisions by forcing subsequent connections from a client to be sent to the same pool member.
According to the BIG-IP Administration: Data Plane Configuration documentation:
Persistence creates a client-to-server mapping that is honored before load balancing algorithms are applied.
When persistence is enabled, BIG-IP may repeatedly select the same pool member even if others are available.
This directly alters load balancing behavior.
Why the other options are incorrect:
A . Adding a OneConnect profile
OneConnect optimizes server-side TCP connections but does not change which pool member is selected.
B . Enabling SNAT automap
SNAT affects source address translation, not pool member selection.
C . Enabling a fallback host in the HTTP profile
A fallback host is only used when no pool members are available.
Correct Resolution:
Adding a persistence profile alters load balancing behavior by maintaining client affinity to a specific pool member.
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