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| Certification Vendor: | F5 Networks |
|---|---|
| Exam Name: | BIG-IP Administration: Install, Initial Configuration, and Upgrade |
| Exam Number: | F5CAB1 |
| Exam Duration: | 120 minutes |
| Exam Format: | Multiple choice, True/False, Multiple select, Scenario-based |
| Certificate Validity Period: | 2 years |
| Available Languages: | English |
| Real Exam Qty: | 76 |
| Exam Price: | $50 USD |
| Related Certifications: | F5 Certified Technology Specialist, BIG-IP Admin (F5CTS-BIG-IP-Admin) |
| Passing Score: | 70% |
| Sample Questions: | F5 F5CAB1 Sample Questions |
| Exam Way: | Online proctored or in-person at Pearson VUE testing centers |
| Pre Condition: | No formal prerequisites, but basic networking knowledge and familiarity with F5 BIG-IP platform is recommended |
| Official Syllabus URL: | https://www.f5.com/learn/certification/f5cab1 |
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NEW QUESTION # 49
Which one of the following is a port and protocol combination allowed by the Allow Default setting for Port Lockdown?
Answer: B
Explanation:
Port Lockdown controls which ports and protocols a Self IP will respond to.
The Allow Default setting permits only a predefined set of BIG-IP internal and required service ports.
The Allow Default list includes:
TCP 443 HTTPS (Management/TMUI access via Self-IP)
TCP 4353 CMI (device sync)
TCP/UDP ports related to HA communication
Other essential internal F5 ports
Why TCP 443 is correct:
It is one of the officially allowed ports under Allow Default.
It enables HTTPS/TMUI access through a Self IP.
NEW QUESTION # 50
For security reasons, a BIG-IP Administrator needs to specify allowable IP ranges for access to the Configuration Utility (WebUI).
The exhibit shows the User Administration section of the Configuration Utility.
The administrator could not find any setting that explicitly restricts access to the Configuration Utility.
Which one of the following is a reason for that?
Answer: D
Explanation:
The screenshot shown is from theUser Administrationsection of the BIG-IP GUI.
This section controls:
* Root and Admin passwords
* SSH Access
* SSH IP Allow settings
However,it does not contain any controls for restricting access to the WebUI (TMUI).
BIG-IP does not provide TMUI access restrictions from this part of the GUI.
Access to the web-based Configuration Utility is controlled by thehttpd allow list, configured through TMSH:
tmsh modify /sys httpd allow { <IP/subnet> }
This setting is not displayed in the User Administration panel, and in many BIG-IP versions, the httpd allow list isonly configurable from the CLI, not the GUI.
Therefore, the administrator cannot find the setting in the screen shown because:
* TMUI access restriction isnotlocated in this GUI section
* It must be configured usingtmshunder/sys httpd allow
This is whyOption Ais correct.
NEW QUESTION # 51
Which command will display the current active volume on a BIG-IP system?
Answer: A
Explanation:
To identify which boot volume is currently active on a BIG-IP system, the correct command is:
tmsh show sys software status
This command displays:
All installed boot volumes (HD1.1, HD1.2, HD1.3, etc.)
The BIG-IP software version installed on each volume
The Active field, indicating which volume the system is currently booted from The installation status ("complete", "in-progress", "allowed") This is the standard and authoritative way to determine the active boot location.
NEW QUESTION # 52
The monitoring team reports that the SNMP server is unable to poll data from a BIG-IP device.
What information will help the BIG-IP Administrator determine whether the issue originates from the BIG-IP system?
Answer: C
Explanation:
The exhibit shows aSelf IPwith:
* VLAN:Data
* Port Lockdown:Allow None
Impact of "Allow None" on SNMP
When a Self IP is configured with:
Port Lockdown: Allow None
the BIG-IP blocksallservices and ports except a few hardcoded HA communication ports.
This means:
* UDP/161 (SNMP)is blocked
* UDP/162 (SNMP traps)is blocked
* The SNMP server cannot poll or receive data from the BIG-IP through this Self IP SNMP relies on access through the Self IP if out-of-band (mgmt interface) is not used.
Thus, the issue is directly caused byPort Lockdown = Allow None, which prevents SNMP communication.
Why the other options are incorrect:
B). Traffic Group must use a floating Traffic Group
* SNMP polling doesnotrequire floating Self IPs.
* Floating groups apply to HA failover IPs, not SNMP functionality.
C). VLAN/Tunnel must allow All VLANs
* Self IPs are always bound to a VLAN; SNMP doesnotrequire All VLANs.
* As long as the Self IP belongs to a reachable VLAN, SNMP can work.
D). Configuration is correct
* It is not correct:Allow Noneblocks SNMP and is the problem.
NEW QUESTION # 53
A BIG-IP Administrator needs to install a HotFix on a standalone BIG-IP device, which has HD1.1 as the Active Boot Location.
The administrator has already re-activated the license and created a UCS archive.
In which sequence should the administrator perform the remaining steps?
Answer: D
Explanation:
When installing a HotFix on a BIG-IP device, F5 best practices require:
Installing the base TMOS image on a new, unused boot volume (HD1.2)
This ensures the upgrade happens on a clean volume.
The existing active boot location remains untouched for rollback.
Installing the HotFix onto the SAME new boot volume (HD1.2)
HotFixes must be applied on top of a base version.
They cannot be installed on an empty volume.
They must match the base image version.
Activating the new boot volume (HD1.2)
The system reboots into the updated software stack.
Activation happens after base + HotFix installation is complete.
This sequence is exactly shown in Option C:
Install base Image in HD1.2
Install HotFix in HD1.2
Activate HD1.2
NEW QUESTION # 54
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