F5CAB4: BIG-IP Administration Control Plane AdministrationDemo

By F5 · Browse Mode
About the Exam

This F5CAB4 exam is one of five exams required for the F5 Certified Administrator, BIG-IP credential. It tests knowledge, skills, and abilities for day-to-day operations and basic deployment, management, security, and support of BIG-IP after it has been installed, configured, and implemented. It is aimed at candidates with a basic understanding of how to install, configure, and upgrade BIG-IP, and passing shows understanding of BIG-IP administration across data plane and control plane topics.

Exam Topics

  • Apply procedural concepts required to manage the state of a high availability pair10%
  • Identify management connectivity configurations10%
  • Identify and report current device status10%
  • List which log files could be used to find events and/or hardware issues10%
  • Apply procedural concepts required to create, manage, and restore a UCS archive10%
  • Explain authentication methods10%
  • Identify configured system services10%
  • Explain config sync10%
  • Given a scenario, determine device upgrade eligibility10%
  • Given a scenario, interpret Service status10%

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  1. Browse — Read each question, select your answer, and reveal the explanation.
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  3. Learn Mode — Spaced repetition schedules questions you struggle with for long-term retention.

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Last updated May 3, 2026 at 10:09 PM

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QuestionQ1

List which log files could be used to find events and/or hardware issues

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A BIG-IP Administrator is investigating disk utilization on a BIG-IP device.

What should the BIG-IP Administrator check next?

  • A Results from the EUD test
  • B Large files on the / file system
  • C Results from the platform diagnostics test
  • D Large files on /usr file system
Explanation

The root filesystem mounted at / has no free space and is at 100% utilization. Checking for large files on / identifies the files responsible for the immediate disk-capacity condition.

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QuestionQ2

Identify management connectivity configurations

A BIG-IP Administrator cannot connect to the management interface over HTTPS.

What could be a reason for this problem?

  • A The IP address of the device used to access the management interface is NOT included in the "IP Allow" list in the Configuration Utility.
  • B The port lockdown setting is configured to Allow None.
  • C An incorrect management route is specified.
  • D The IP address of the device used to access the management interface is NOT included in the "httpd Allow" list in the CLI.
Explanation

The BIG-IP sys httpd allow setting is the access-control list for clients from which the HTTP daemon accepts requests. Because the Configuration utility is served by httpd over HTTPS, a management client whose source IP address is absent from this list is denied access.

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QuestionQ3

Explain config sync

Refer to the output below.

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Which TMSH command produced this output?

  • A tmsh show /sys sync-status
  • B tmsh list /sys sync-status
  • C tmsh list /cm sync-status
  • D tmsh show /cm sync-status
Explanation

cm sync-status displays the local device’s configuration-synchronization status, including device-group consistency and peer connectivity. Its documented display operation is show, so the fully qualified command is tmsh show /cm sync-status.

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QuestionQ4

Identify and report current device status

The BIG-IP Administrator executes netstat -an | grep :443 and observes this output: tcp 0 0 0.0.0.0:443 0.0.0.0:* LISTEN.

What does this output show about the service on port 443?

  • A The service is actively listening on all interfaces for HTTPS traffic.
  • B The service is actively listening only on the loopback interface.
  • C The service is in a standby state and unable to accept connections.
  • D The service indicates no connections to the LISTEN port
Explanation

0.0.0.0:443 is an IPv4 wildcard bind, so the TCP service is bound to port 443 on all IPv4 interfaces. LISTEN means it is ready to accept incoming connections; port 443 is the standard HTTPS port.

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QuestionQ5

List which log files could be used to find events and/or hardware issues

Which log file should a BIG-IP Administrator review to find out whether a particular user attempted to sign in to the BIG-IP Configuration Utility?

  • A /var/log/ltm
  • B /var/log/pam/tallylog
  • C /var/log/httpd
  • D /var/log/secure
Explanation

/var/log/secure records BIG-IP security and authentication-related events, including those associated with attempted access to the Configuration Utility. F5’s management-interface guidance uses this log to verify Configuration Utility access attempts.

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Topics covered
Apply procedural concepts required to manage the state of a high availability pairIdentify management connectivity configurationsIdentify and report current device statusList which log files could be used to find events and/or hardware issuesApply procedural concepts required to create, manage, and restore a UCS archiveExplain authentication methodsIdentify configured system servicesExplain config syncGiven a scenario, determine device upgrade eligibilityGiven a scenario, interpret Service status
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