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F5 F5CAB1 시험요강:

주제소개
주제 1
  • BIG IP Administration Support and Troubleshooting: This section of the exam measures skills of Network Administrators and covers identifying and resolving common issues that affect BIG IP operation. It focuses on using logs, statistics, diagnostic tools, and basic troubleshooting methods to restore normal traffic flow and maintain stable application delivery.
주제 2
  • BIG IP Administration Install Initial Configuration and Upgrade: This section of the exam measures skills of System Administrators and covers the lifecycle tasks for deploying and maintaining a BIG IP system. It includes installing the platform, performing initial setup, applying licenses, configuring basic networking, and planning and executing software upgrades and hotfixes.
주제 3
  • BIG IP Administration Data Plane Configuration: This section of the exam measures skills of System Administrators and covers configuring BIG IP objects that control data plane behavior. It focuses on setting up virtual servers, pools, nodes, monitors, and profiles so that applications are delivered reliably and efficiently according to design requirements.
주제 4
  • BIG IP Administration Data Plane Concepts: This section of the exam measures skills of Network Administrators and covers how BIG IP handles application traffic on the data plane. It includes understanding flow of traffic, key data path components, basic concepts of load balancing, and how security and performance features affect user traffic.
주제 5
  • BIG IP Administration Control Plane Administration: This section of the exam measures skills of System Administrators and covers managing the control plane where BIG IP is configured and administered. It includes working with user accounts, roles, device settings, configuration management, and using the graphical interface and command line for daily administrative tasks.

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최신 F5-CA F5CAB1 무료샘플문제 (Q26-Q31):

질문 # 26
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?

정답：A

설명：
The exhibit shows a Self IP with:
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 blocks all services 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 by Port Lockdown = Allow None, which prevents SNMP communication.


질문 # 27
The Port Lockdown feature prevents unwanted connection attempts to a Self IP. Which three types of connection attempts are unaffected by Port Lockdown settings?

정답：B

설명：
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.


질문 # 28
What is required when setting up an HA (High Availability) pair of BIG-IP devices?

정답：D

설명：
For HA to function correctly, both devices need to be running the same software version and have the same hardware model to ensure compatibility and synchronization.


질문 # 29
How should the BIG-IP Administrator block connections to a Self IP on port 443 while allowing connections to other ports?

정답：C

설명：
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.


질문 # 30
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?

정답：B

설명：
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


질문 # 31
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