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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Securing BIG-IP | 20% | - Management security
|
| Topic 2: System Upgrade and Maintenance | 20% | - Upgrade procedures
|
| Topic 3: Software Image Management | 20% | - Installation and upgrade preparation
|
| Topic 4: Management Connectivity and Configuration | 20% | - Management network setup
|
| Topic 5: Licensing | 20% | - License activation
|
We guarantee you that our top-rated F5 F5CAB1 practice exam will enable you to pass the F5 F5CAB1 certification exam on the very first go. The authority of BIG-IP Administration Install, Initial Configuration, and Upgrade F5CAB1 Exam Questions rests on its being high-quality and prepared according to the latest pattern.
NEW QUESTION # 40
The BIG-IP Administrator wants to manage the newly built F5 system through an in-band Self-IP.
The administrator has configured a VLAN and Self-IP and can ping the IP from their workstation, but cannot access the system via SSH or HTTPS.
What port lockdown settings should the BIG-IP Administrator use to allow management access on the Self-IP? (Choose two.)
Answer: B,D
Explanation:
Self-IPs include a security feature called Port Lockdown, which restricts which services respond on that Self-IP.
By default, Self-IPs block management access (SSH and HTTPS/TMUI), meaning an administrator cannot manage the device through in-band Self-IPs unless explicitly allowed.
Allow Mgmt / Allow Management
These settings enable only the management services required for administrative access, specifically:
SSH (22)
HTTPS/TMUI (443)
These options allow secure administration without opening unnecessary ports.
Why these are correct:
They provide only the essential access for management.
They follow F5 security best practices when using in-band admin access.
They do not expose all services, reducing the attack surface.
NEW QUESTION # 41
The BIG-IP Administrator needs to update access to the Configuration Utility to include the172.28.31.0/24and
172.28.65.0/24networks.
From the TMOS Shell (tmsh), which command should the BIG-IP Administrator use to complete this task?
Answer: C
Explanation:
Access to the BIG-IP Configuration Utility (TMUI) is controlled through the/sys httpd allowlist.
This list defines which IP addresses or subnets are allowed to connect to the management web interface.
To allow two new subnets-172.28.31.0/24and172.28.65.0/24-the administrator mustaddboth subnets to the existing list without removing current entries.
In tmsh, subnet entries must be specified innetwork/netmask format, for example:
172.28.31.0/255.255.255.0
The correct tmsh command to append these networks is:
modify /sys httpd allow add { 172.28.31.0/255.255.255.0 172.28.65.0/255.255.255.0 } Why the other options are incorrect:
Option B:
* IPs are listed without masks, which is invalid for subnet-based access control.
* The system requiresnetwork/netmaskformat.
Option C:
* The command uses permit instead of allow, which is not a valid attribute of /sys httpd.
* The correct keyword must beallow.
Thus, onlyOption Acorrectly adds both permitted subnets in the proper tmsh format.
NEW QUESTION # 42
An F5 BIG-IP Administrator is asked to report which modules areprovisionedon the BIG-IP.
In which two ways can this be done?
(Choose two.)
Answer: B,C
Explanation:
Provisioning determines:
* Which BIG-IP modules are enabled (LTM, ASM, APM, AFM, DNS, etc.)
* Their provisioning levels (None, Minimal, Nominal, Dedicated)
Two accurate ways to view provisioning settings are:
A). GUI - System # Resource Provisioning # Module Allocation
This is the primary GUI screen showing:
* All modules
* Their provisioning level
* System resource distribution impact
Administrators commonly use this page to confirm or change module provisioning.
D). TMSH - list /sys provision
This tmsh command displays each module and its provisioning level:
sys provision ltm { level nominal }
sys provision asm { level none }
This is the authoritative CLI method for checking module provisioning configurations.
Why the other options are incorrect:
B). show /sys provision
* Showsruntimeinformation butnot the actual configuration levels.
* list is the correct command for configuration details.
C). Statistics # Module Statistics
* Shows performance statistics, NOT provisioning status.
Therefore, the correct responses areAandD.
NEW QUESTION # 43
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 # 44
A BIG-IP Administrator is using Secure Copy Protocol (SCP) to transfer a TMOS image to the BIG-IP system in preparation for an upgrade.
To what directory should the file be transferred?
Answer: A
Explanation:
BIG-IP systems require all ISO images (base TMOS images and HotFix images) to be stored in a specific directory used for software installation:
/shared/images/
This directory:
* Is theonly supported locationfrom which the BIG-IP software installation system validates and installs ISO files
* Is accessible by both the GUI and TMSH installers
* Has adequate storage space allocated specifically for images
* Is part of the shared partition that persists across reboots
When transferring images via SCP, the administrator must copy them directly into/shared/images/so that:
* The GUI (System # Software Management # Available Images) can detect the image
* TMSH install software image commands can reference it
Other directories such as/local/images/or/var/images/are not valid storage paths for software images.
NEW QUESTION # 45
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