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Exam F5CAB1 Topic 1 Question 71 Discussion

Actual exam question for F5's F5CAB1 exam
Question #: 71
Topic #: 1
Refer to the exhibit. What traffic will be permitted to reach the BIG-IP?

Suggested Answer: B Vote an answer

The exhibit shows the configuration of a Self IP with:
Port Lockdown: Allow Custom
A Custom List that includes the following TCP ports:
443
22
Meaning of these ports:
TCP 443 -> HTTPS (TMUI -- web-based management)
TCP 22 -> SSH (command-line remote access)
No other TCP, UDP, or protocol entries are listed; therefore, only these two services are allowed to reach the BIG-IP via this Self IP.
Evaluating the answer choices:
Option Service Port Allowed?
Not allowed
FTP TCP 21 Not listed
Allowed
SSH TCP 22 Listed
Not allowed
Telnet TCP 23 Not listed
Thus, SSH is the only traffic permitted through this Self IP configuration.

by Gloria at Aug 20, 2026, 02:18 PM

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