F5CAB4 Control Plane Administration Practice Question
An administrator notices that the BIG-IP system time is drifting. Why is this critical for control plane stability in an HA configuration?
⚠ Common exam trap
Candidates often underestimate the impact of time drift, assuming it is just a logging issue rather than a critical factor for HA heartbeat and security token validity.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
It impacts the validity of heartbeat timers.
Time synchronization is vital for HA, as it ensures that logs, audit trails, and, most importantly, certificate validity checks and heartbeat monitoring are synchronized. When clocks drift, HA heartbeat packets may be rejected or ignored, potentially causing 'split-brain' scenarios. Maintaining accurate time via NTP is essential for the reliability of the control plane and the overall synchronization state between cluster members.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The GUI will be unable to render charts.
Why it's wrong here
While chart rendering might be affected by time mismatches in some web applications, it is a minor UI issue. The critical risk in an HA scenario is not the display of data, but the breakdown of the cluster's synchronization logic, which relies on accurate timing for heartbeat monitoring.
- ✓
It impacts the validity of heartbeat timers.
Why this is correct
HA heartbeat monitoring relies on precise timing to detect peer health. If clocks drift significantly, the heartbeat mechanism can become desynchronized, leading to false failovers or a 'split-brain' state. This compromises the entire HA system, making time synchronization via NTP a critical requirement for cluster stability.
- ✗
It causes the TMM process to restart.
Why it's wrong here
TMM processes do not restart based on system clock drift. While time is used for internal logging and accounting, TMM is designed to be resilient to minor time changes. The impact of clock drift is primarily limited to control-plane functions like logging and HA peer state tracking.
- ✗
SNMP traps will stop functioning.
Why it's wrong here
SNMP traps are generated based on events rather than the current time. While the timestamps in the traps might be incorrect, the trap generation mechanism itself remains functional. Clock drift is a management-plane issue that has far more severe consequences for HA than the reporting of SNMP events.
Visual reference
About these practice questions
Courseiva writes every F5CAB4 question from scratch — 40 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official F5 exam blueprint
This F5CAB4 practice question is part of Courseiva's free F5 certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the F5CAB4 exam.