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| Certification Vendor: | F5 |
|---|---|
| Exam Name: | BIG-IP Administration Install, Initial Configuration, and Upgrade |
| Exam Number: | F5CAB1 |
| Passing Score: | 245 |
| Exam Price: | USD 50 (Online), USD 65 (Test Center) |
| Available Languages: | English |
| Certificate Validity Period: | 2 years |
| Exam Format: | Multiple-choice, Scenario-based |
| Related Certifications: | F5CAB3 BIG-IP Administration Data Plane Configuration F5CAB5 BIG-IP Administration Support and Troubleshooting F5CAB4 BIG-IP Administration Control Plane Administration F5CAB2 BIG-IP Administration Data Plane Concepts |
| Real Exam Qty: | 30 |
| Exam Duration: | 30 minutes |
| Recommended Training: | F5 BIG-IP Administration Training F5 Certified Administrator Study Guide |
| Exam Registration: | Pearson VUE F5 Education Services Certiverse |
| Sample Questions: | F5 F5CAB1 Sample Questions |
| Exam Way: | Online proctored via Certiverse; In-person at Pearson VUE test centers |
| Pre Condition: | No mandatory prerequisites; basic IT knowledge and familiarity with BIG-IP systems recommended |
| Official Syllabus URL: | https://education.f5.com/exams/administration-install-initial-configuration-and-upgrade |
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NEW QUESTION # 16
Refer to the exhibit. What traffic will be permitted to reach the BIG-IP?
Answer: B
Explanation:
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.
NEW QUESTION # 17
The Port Lockdown feature prevents unwanted connection attempts to a Self IP. Which three types of connection attempts are unaffected by Port Lockdown settings?
Answer: B
Explanation:
Port Lockdown controls which ports and protocols a Self IP will respond to.
However, certain traffic types bypass Port Lockdown for BIG-IP functionality and routing integrity.
The three types that are NOT affected by Port Lockdown are:
1. Defined Virtual Server Traffic
Traffic destined to a Self IP that matches a configured virtual server is always accepted by the BIG-IP, regardless of Port Lockdown settings.
This ensures that traffic processing does not break when administrators restrict Self-IP ports.
2. ICMP (Internet Control Message Protocol)
ICMP (such as ping, traceroute responses, etc.) always passes through a Self IP even when Port Lockdown is set to:
Allow Default
Allow None
Allow Custom
F5 allows ICMP for reachability and diagnostic purposes independent of Port Lockdown rules.
3. Centralized Management Infrastructure (CMI)
CMI includes the internal HA services used for:
Device Trust
ConfigSync
Failover
Mirroring
These essential HA communications bypass Port Lockdown to prevent accidental cluster failure.
The well-known port for this traffic is TCP 4353, which is always permitted.
NEW QUESTION # 18
How should a BIG-IP Administrator check theprovisioned CPU percentfor a module?
(Choose two.)
Answer: C,E
Explanation:
BIG-IP allocates CPU and memory resources based on module provisioning levels.
To view how much CPU a module is assigned, administrators must check provisioning information from:
C). GUI - System Resource Provisioning
This page visually displays CPU allocation via color-coded bars.
Hovering over the CPU bar shows:
* CPU usage percent per module
* Which modules share CPU cycles
* The system's total resource allocation
This is the primary GUI method.
D). tmsh show /sys provision
This command displays detailed module provisioning information including:
* Provisioned modules
* Their provisioning level
* CPU and memory allocation data
It is the authoritative CLI method for resource provisioning status.
Why the other options are incorrect:
A). top
* Shows real-time process usage, notprovisionedCPU allocation.
B). tmsh show /sys cpu
* Displays CPU runtime utilization, not per-module provisioning.
E). Statistics Dashboard
* Only shows traffic / system runtime metrics, not provisioning resource allocations.
Therefore,C and Dare correct.
NEW QUESTION # 19
How should the BIG-IP Administrator block connections to a Self IP on port 443 while allowing connections to other ports?
Answer: B
Explanation:
Comprehensive and Detailed Explanation From BIG-IP Administration - Install, Initial Configuration, and Upgrade:
BIG-IP Self IP addresses have an associated Port Lockdown feature that governs which protocols and services are permitted to communicate directly with that Self IP. By default, Self IPs may allow broader access than desired, making Port Lockdown a critical hardening control.
The Allow Custom option under Port Lockdown is the precise mechanism for administrators who need granular, port-specific filtering. When selected, only the explicitly listed TCP/UDP ports are permitted - all others, including port 443 (HTTPS), are implicitly denied. This satisfies the requirement of blocking 443 specifically while preserving access on other required ports.
The remaining options are incorrect for this scenario:
* Option A references SSH access control under System > Platform, which governs management-plane SSH - not Self IP service filtering.
* Option B disables the entire Self IP, removing all traffic handling, which is operationally disruptive.
* Option D - Allow None - blocks all traffic to the Self IP, not selectively port 443.
The Allow Custom approach provides the surgical precision required: administrators enumerate permitted ports, and everything outside that list - including 443 - is dropped.
Reference Topics: Self IP Port Lockdown, Network Security Hardening, Self IP Configuration - BIG-IP Administration Study Guide.
NEW QUESTION # 20
The BIG-IP Administrator received a ticket that an authorized user is attempting to connect to the Configuration Utility from a jump host and is being denied.
The HTTPD allow list is configured as:
sys httpd {
allow { 172.28.31.0/255.255.255.0 172.28.65.0/255.255.255.0 }
}
The jump host IP is172.28.32.22.
What command should the BIG-IP Administrator use to allow HTTPD access for this jump host?
Answer: C
Explanation:
The HTTPD allow list controls which IP addresses or subnets may access the Configuration Utility (TMUI) on the BIG-IP system. The Administrator already has two subnets allowed and needs to add asingle host IPto the existing list.
* The object/sys httpd allowsupports actions such asadd,delete, andreplace-all-with.
* Because the goal is toaddone more entry without removing the existing permitted subnets, the correct command is:
modify /sys httpd allow add { 172.28.32.22 }
This appends the new host to the existing list while preserving the previously configured networks.
Why the other options are incorrect:
* Option A (replace-all-with)wouldoverwritethe entire allow list, removing existing permitted subnets- unacceptable.
* Option B (delete)wouldremovethe existing networks and not add the required host.
Therefore, the correct administrative action is toaddthe jump host's IP.
NEW QUESTION # 21
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