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NEW QUESTION # 48
A Standard Virtual Server for a web application is configured with Automap for Source Address Translation. The original client IP must be known by backend servers.
What should the BIG-IP Administrator configure?
Answer: C
Explanation:
The X-Forwarded-For header preserves the original client IP when SNAT is enabled.
NEW QUESTION # 49
A BIG-IP Administrator uses backend servers to host multiple services per server. There are multiple virtual servers and pools defined, referencing the same backend servers.
Which load balancing algorithm is most appropriate to have an equal number of connections on each backend server? (Choose one answer)
Answer: B
Explanation:
In this scenario, each backend node (server) hosts multiple services and is referenced by multiple pools and virtual servers. The goal is to ensure an equal number of total connections per backend server, regardless of how many pool members (services/ports) exist on that server.
According to the BIG-IP Administration: Data Plane Configuration documentation:
Least Connections (node) tracks the total number of active connections to a node across all pool members and services.
This algorithm ensures load distribution is balanced at the server level, not just at the individual service (member) level.
It is specifically recommended when:
Multiple pool members exist on the same backend server
Multiple virtual servers reference the same backend servers
Why the other options are incorrect:
B . Predictive (member)
Predictive algorithms are advanced and traffic-pattern based, but they operate at the member level and do not guarantee equal connections per server.
C . Least Connections (member)
This balances connections per pool member, which can overload a server hosting multiple members while still appearing "balanced" per member.
D . Predictive (node)
Although node-aware, predictive algorithms are less deterministic and not the best choice when strict equality of connections is required.
Correct Resolution:
Using Least Connections (node) ensures that each backend server carries an equal connection load across all services and pools.
NEW QUESTION # 50
A configuration change is made on the standby member of a device group. What is displayed as " Recommended Action " on the Device Management Overview screen?
Answer: C
Explanation:
The BIG-IP system uses a centralized management framework to ensure that all devices within a Sync- Failover group share a consistent configuration. When an administrator makes a change on any member of the group-whether it is the active or the standby device-the system detects a " ConfigSync " mismatch. The " Device Management > > Overview " screen tracks these changes by comparing the commit ID and timestamps of the configurations across all peers.
If a change is made on the standby member, that device now possesses a more recent configuration than the other members of the group. Consequently, the BIG-IP GUI will display a status of " Changes Pending " and suggest a Recommended Action to resolve the discrepancy. In this scenario, the correct action is to Synchronize the standby member configuration to the group. This push operation will copy the updated configuration from the standby device to the active device (and any other peers), bringing the entire cluster back into a " In Sync " status. It is important to note that BIG-IP allows bi-directional synchronization; you do not have to be on the active device to push a configuration. However, administrators must be cautious:
choosing Option C (Synchronizing the active member to the group) would overwrite the changes just made on the standby device with the older configuration from the active device, effectively reverting the changes. The Recommended Action always points toward the direction that propagates the most recent change to the rest of the group.
NEW QUESTION # 51
A BIG-IP Administrator needs to apply persistence to a virtual server that is configured as a Performance (Layer 4) virtual server that allows access to a secure (TLS) e-commerce website.
What type of persistence profile can be used? (Choose one answer)
Answer: D
Explanation:
A Performance (Layer 4) virtual server does not inspect or process application-layer data such as HTTP headers or cookies. Therefore, only Layer 4-compatible persistence methods can be used.
According to the BIG-IP Administration: Data Plane Configuration documentation:
Source Address Affinity persistence operates at Layer 4 and uses the client IP address to maintain session persistence.
It is fully compatible with Performance (Layer 4) virtual servers.
It works regardless of encryption, making it suitable for TLS-secured applications.
Why the other options are incorrect:
B . Cookie persistence
Requires an HTTP profile and Layer 7 inspection, which is not supported on Performance virtual servers.
C . Microsoft RDP persistence
Is protocol-specific and not applicable to web-based TLS traffic.
D . Host persistence
Requires HTTP host header inspection, which is not available at Layer 4.
Correct Resolution:
Source Address Affinity persistence is the appropriate choice for maintaining persistence on a Performance (Layer 4) virtual server handling TLS traffic.
Below is Batch 1 (Questions 1-10) extracted only from your uploaded document that are directly related to BIG-IP Administration: Data Plane Configuration topics (Virtual Servers, Pools, Load Balancing, Monitors, Persistence, SNAT, Profiles).
I have excluded system-only, licensing, support, hardware, HA management-only, and admin UI questions that are not Data Plane-focused.
Source: Your uploaded TMOS Administration v2.0 document
โ
BATCH 1 (10 Questions)
NEW QUESTION # 52
Refer to the exhibit.
A BIG-IP Administrator needs to configure health monitors for a newly configured server pool named Pool_B.
Which health monitor settings will ensure that all pool members will be accurately marked as available or unavailable? (Choose one answer)
Answer: B
Explanation:
From the exhibit, the pool contains different applications on different service ports (for example, HTTP/80, FTP/21, HTTPS/443, SSH/22). To mark pool members correctly, BIG-IP must be able to verify the actual service running on each member's port.
In BIG-IP Administration: Data Plane Configuration, monitor behavior is described as follows:
When multiple monitors are assigned to a pool, the Availability Requirement controls how monitor results are evaluated:
At least one = the pool member is marked up if any one of the assigned monitors succeeds.
All = the pool member is marked up only if every assigned monitor succeeds.
For pools containing members with different services/ports, using All can incorrectly mark members down because monitors intended for other services will fail on the wrong port.
Why C is correct:
Assigning HTTPS, HTTP, FTP, and SSH covers the actual services shown in the pool.
Setting the Availability Requirement to at least one ensures that each pool member is considered available when its appropriate service monitor succeeds, without being forced to pass unrelated service monitors.
Why the other options are incorrect:
A / D (Availability Requirement = all): would cause members to be marked down when unrelated monitors fail (e.g., SSH monitor against an HTTP member).
B (includes ICMP): ICMP can indicate the host is reachable even if the application service is down, which does not "accurately" reflect service availability.
Therefore, the best choice is HTTPS, HTTP, FTP, and SSH with Availability Requirement of at least one health monitor.
NEW QUESTION # 53
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