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NEW QUESTION # 21
A BIG-IP Administrator configures remote authentication and needs to ensure that users can still log in even when the remote authentication server is unavailable. Which action should the BIG-IP Administrator take in the remote authentication configuration to meet this requirement? (Choose one answer)
Answer: C
Explanation:
Although remote authentication (LDAP, RADIUS, TACACS+) is a control-plane / management-plane feature, it directly affects availability and resiliency of administrative access, which is a critical operational HA consideration.
How BIG-IP Remote Authentication Works:
* BIG-IP can authenticate administrators against:
* LDAP
* RADIUS
* TACACS+
* When remote authentication is enabled, BIG-IP by default relies on the remote server for user authentication
* If the remote authentication server becomes unreachable, administrators may be locked out unless fallback is configured Why "Fallback to Local" Is Required:
The Fallback to Local option allows BIG-IP to:
* Attempt authentication against the remote authentication server first
* If the remote server is unreachable or unavailable, fall back to:
* Local BIG-IP user accounts (admin, or other locally defined users)
This ensures:
* Continuous administrative access
* Safe recovery during:
* Network outages
* Authentication server failures
* Maintenance windows
This behavior is explicitly recommended as a best practice in BIG-IP administration to avoid loss of management access.
Why the Other Options Are Incorrect:
* A. Configure a second remote user directory
* Provides redundancy only if both directories are reachable
* Does not help if remote authentication as a whole is unavailable
* B. Configure a remote role group
* Maps remote users to BIG-IP roles
* Does not affect authentication availability
* D. Set partition access to "All"
* Controls authorization scope after login
* Has no impact on authentication success
Key Availability Concept Reinforced:
To maintain administrative access resiliency, BIG-IP administrators should always enable Fallback to Local when using remote authentication. This prevents lockouts and ensures access even during authentication infrastructure failures.
NEW QUESTION # 22
A BIG-IP Administrator configures remote authentication and needs to ensure that users can still log in even when the remote authentication server is unavailable. Which action should the BIG-IP Administrator take in the remote authentication configuration to meet this requirement? (Choose one answer)
Answer: C
Explanation:
Although remote authentication (LDAP, RADIUS, TACACS+) is a control-plane / management-plane feature, it directly affects availability and resiliency of administrative access, which is a critical operational HA consideration.
How BIG-IP Remote Authentication Works:
BIG-IP can authenticate administrators against:
LDAP
RADIUS
TACACS+
When remote authentication is enabled, BIG-IP by default relies on the remote server for user authentication If the remote authentication server becomes unreachable, administrators may be locked out unless fallback is configured Why "Fallback to Local" Is Required:
The Fallback to Local option allows BIG-IP to:
Attempt authentication against the remote authentication server first
If the remote server is unreachable or unavailable, fall back to:
Local BIG-IP user accounts (admin, or other locally defined users)
This ensures:
Continuous administrative access
Safe recovery during:
Network outages
Authentication server failures
Maintenance windows
This behavior is explicitly recommended as a best practice in BIG-IP administration to avoid loss of management access.
Why the Other Options Are Incorrect:
A . Configure a second remote user directory
Provides redundancy only if both directories are reachable
Does not help if remote authentication as a whole is unavailable
B . Configure a remote role group
Maps remote users to BIG-IP roles
Does not affect authentication availability
D . Set partition access to "All"
Controls authorization scope after login
Has no impact on authentication success
Key Availability Concept Reinforced:
To maintain administrative access resiliency, BIG-IP administrators should always enable Fallback to Local when using remote authentication. This prevents lockouts and ensures access even during authentication infrastructure failures.
NEW QUESTION # 23
The BIG-IP Administrator wants to provide quick failover between the F5 LTM devices that are configured as an HA pair with a single Self IP using the MAC Masquerade feature. The administrator configures MAC masquerade for traffic-group-1 using the following command:
`tmsh modify /cm traffic-group traffic-group-1 mac 02:12:34:56:00:00`
However, the Network Operations team identifies an issue with using the same MAC address across multiple VLANs. As a result, the administrator enables Per-VLAN MAC Masquerade to ensure a unique MAC address per VLAN by running:
`tmsh modify /sys db tm.macmasqaddr_per_vlan value true`
What would be the resulting MAC address on a tagged VLAN with ID 1501? (Choose one answer)
Answer: C
NEW QUESTION # 24
Refer to the exhibit above.
A BIG-IP pool is configured withPriority Group Activation = Less than 2 available members. The pool members have different priority groups and availability states. Which pool members arereceiving traffic?
(Choose one answer)
Answer: B
Explanation:
This question tests understanding ofPriority Group Activation (PGA)and how BIG-IP determines which pool members are eligible to receive traffic.
Key BIG-IP Priority Group Concepts:
* Higher priority group numbers = higher priority
* BIG-IP willonly send traffic to the highest priority groupthat meets thePriority Group Activation condition
* Lower priority groups areactivated only when the condition is met
* Onlyavailable (green)members count toward the activation threshold
Configuration from the Exhibit:
* Priority Group Activation:Less than 2 available members
* Pool Members and Status:
Pool Member
Priority Group
Status
serv1
2
Active (available)
serv2
2
Inactive (down)
serv3
1
Active (available)
serv4
1
Active (available)
Step-by-Step Traffic Decision:
* BIG-IP first evaluates thehighest priority group (Priority Group 2)
* Priority Group 2 has:
* serv1 # available
* serv2 # unavailable
* Total available members = 1
* Activation rule isLess than 2 available members
* Condition istrue(1 < 2)
* BIG-IPactivates the next lower priority group (Priority Group 1)
* Traffic is now sent to:
* serv1 (Priority Group 2)
* serv3 and serv4 (Priority Group 1)
Final Result:
Traffic is distributed toserv1, serv3, and serv4
Why the Other Options Are Incorrect:
* A- Ignores activation of the lower priority group
* B- serv4 is also active and eligible
* C- serv2 is down and cannot receive traffic
Key Data Plane Concept Reinforced:
Priority Group Activation controls when lower-priority pool members are allowed to receive traffic, based strictly on the number ofavailable membersin the higher-priority group. In this case, the failure of one high-priority member caused BIG-IP toexpand traffic distributionto lower-priority members to maintain availability.
NEW QUESTION # 25
An ecommerce company is experiencing latency issues with online shops during Black Friday's peak season. The BIG-IP Administrator detects an overall high CPU load on the BIG-IP device and wants to move the top utilized Virtual Servers to a dedicated BIG-IP device. Where should the BIG-IP Administrator determine the problematic Virtual Servers? (Choose one answer)
Answer: A
Explanation:
Comprehensive and Detailed Explanation From BIG-IP Administration Data Plane Concepts documents:
When troubleshooting performance and latency issues on BIG-IP, especially under peak load conditions, it is critical to identify which Virtual Servers are consuming the most resources. This is a core data plane analysis task.
BIG-IP provides multiple views of configuration and status, but only certain areas expose real-time and historical traffic statistics that correlate directly with CPU usage and throughput.
Why Option C Is Correct:
Statistics > Module Statistics > Local Traffic > Virtual Servers provides:
Real-time and cumulative statistics per Virtual Server
Metrics such as:
Bits in / Bits out
Packets in / Packets out
Current connections
Connection rate
Total requests
The ability to identify high-traffic or high-connection Virtual Servers, which are the most likely contributors to elevated CPU utilization These statistics allow the administrator to objectively determine which Virtual Servers are the top consumers of system resources and therefore good candidates for migration to a dedicated BIG-IP device.
Why the Other Options Are Incorrect:
A . Local Traffic > Virtual Servers > Virtual Server List
Primarily a configuration view
Does not provide sufficient performance or utilization statistics to identify CPU-heavy Virtual Servers B . System > Platform Displays hardware-level information such as CPU cores, memory, disk, and platform type Does not break down utilization by Virtual Server D . Local Traffic > Network Map Provides a logical topology view of Virtual Servers, pools, and pool members Useful for understanding relationships, but not for identifying high-utilization Virtual Servers Key Data Plane Concept Reinforced:
To diagnose performance problems and plan traffic redistribution, BIG-IP administrators must rely on Module and object-level statistics, not configuration screens. The Virtual Server statistics view is the authoritative location for identifying traffic hotspots that directly impact CPU and latency during peak events such as Black Friday.
NEW QUESTION # 26
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