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NEW QUESTION # 31
The BIG-IP Administrator has configured an HTTP health monitor applied to a Pool of HTTP web servers hosting www.f5.com, but all Pool Members show a DOWN status. The web server is returning a response of '
400 Bad Request ' . What would be the correct monitor Send string?
Answer: C
Explanation:
A 400 Bad Request response from an HTTP/1.1 web server is a definitive indicator that the HTTP request sent by the health monitor is missing a required Host header . In HTTP/1.1, the Host header is mandatory per RFC 7230. Web servers - particularly those hosting named virtual hosts such as www.f5.com - will reject any HTTP/1.1 request that omits the Host header, returning a 400 error, which the BIG-IP monitor interprets as a failed health check, marking all members DOWN.
The correct Send string must include:
* The GET request line with HTTP/1.1 protocol declaration
* A \r\n (carriage return + line feed) after the request line
* The Host: www.f5.com header to satisfy HTTP/1.1 requirements
* A \r\n after the Host header
* Connection: Close header to instruct the server to close the connection after responding
* A final \r\n\r\n to properly terminate the HTTP request headers
Only option C satisfies all these requirements with the correct syntax and Host header inclusion.
Option D (the current configured string) omits the Host header entirely - the root cause of the 400 error.
Options A and B are structurally incomplete or syntactically malformed.
Reference: BIG-IP Administration - Data Plane Configuration, Module: Health Monitors - HTTP Monitor Send String Configuration and HTTP/1.1 Host Header Requirements.
NEW QUESTION # 32
A BIG-IP Administrator creates a new VLAN on BIG-IP Cluster Member A and attaches an interface to it.
Although the Auto Config Sync is in place, the new VLAN does NOT show up on Cluster Member B. What should the BIG-IP Administrator do to ensure the new VLAN is configured on each Cluster Member?
Answer: C
NEW QUESTION # 33
A Standard Virtual Server reports poor performance for Internet users.
What TCP profile configuration should be applied?
Answer: C
Explanation:
WAN-optimized TCP profiles improve performance for high-latency Internet clients, while LAN profiles are optimal for backend servers.
NEW QUESTION # 34
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: A
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 # 35
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 # 36
......
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