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[General] F5CAB2 Real Exam - F5CAB2 Torrent Vce & F5CAB2 Valid Questions

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【General】 F5CAB2 Real Exam - F5CAB2 Torrent Vce & F5CAB2 Valid Questions

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F5 BIG-IP Administration Data Plane Concepts (F5CAB2) Sample Questions (Q33-Q38):NEW QUESTION # 33
A development team needs to apply a software fix and troubleshoot one of its servers. The BIG-IP Administrator needs to immediately remove all connections from the BIG-IP system to the back-end server.
The BIG-IP Administrator checks the virtual server configuration and finds that a persistence profile is assigned to it.
What should the BIG-IP Administrator do to meet this requirement? (Choose one answer)
  • A. Set the pool member to an Offline state and manually delete existing connections through the command line
  • B. Set the pool member to a Disabled state
  • C. Set the pool member to a Forced Offline state and manually delete existing connections through the command line
  • D. Set the pool member to a Forced Offline state
Answer: D
Explanation:
In BIG-IP traffic management, persistence profiles cause existing client connections (and subsequent requests) to be repeatedly sent to the same pool member. When persistence is enabled, simply preventing new connections is not sufficient if the requirement is to immediately remove all existing connections.
Key behavior of pool member states:
* Forced Offline
* Immediately removes the pool member from load balancing.
* Terminates all existing connections, regardless of persistence.
* Prevents new connections from being established.
* This is the correct state when urgent maintenance or troubleshooting is required.
* Disabled
* Prevents new connections from being sent to the pool member.
* Allows existing connections to continue, which is not acceptable when persistence is configured and connections must be cleared immediately.
* Offline (non-forced)
* Similar to Disabled behavior depending on context.
* Does not guarantee immediate termination of existing connections.
* Manually deleting connections via the command line
* Is unnecessary and operationally inefficient.
* BIG-IP already provides a supported mechanism (Forced Offline) to cleanly and immediately remove traffic.
Conclusion:
To immediately remove all existing connections, including those maintained by persistence, the BIG-IP Administrator must set the pool member to a Forced Offline state. This directly satisfies the requirement without additional manual steps.

NEW QUESTION # 34
A virtual server is listening at 10.10.1.100:80 and has the following iRule associated with it:
when HTTP_REQUEST { if { [HTTP::header UserAgent] contains "MSIE" }
{ pool MSIE_pool }
else { pool Mozilla_pool }
If
a user connects to http://10.10.1.100/foo.html and their browser does not specify a UserAgent, which pool will receive the request?
  • A. None. The request will be dropped.
  • B. MSIE_pool
  • C. Unknown. The pool cannot be determined from the information provided.
  • D. Mozilla_pool
Answer: D

NEW QUESTION # 35
Which statement is true concerning the default communication between a redundant pair of BIG-IP devices?
  • A. Data for both connection and persistence mirroring are shared through the same TCP connection.
  • B. Connection mirroring data is shared through the serial fail over cable unless network failover is enabled.
  • C. Communication between the systems cannot be effected by port lockdown settings.
  • D. Regardless of the configuration, some data is communicated between the systems at regular intervals.
Answer: D
Explanation:
Redundant BIG-IP systems (HA pairs) must maintain constant communication to monitor the health of the peer and synchr15onize states.16
* Heartbeats: By default, even with a serial cable, th17e BIG-IP systems exchange "heartbeat" packets over the network to determine if the peer is still alive.
* Network Failover: This involves the exchange of UDP packets (typically on port 1026) at regular intervals.
* Device Service Clustering (DSC): Modern BIG-IP versions use the Central Management (cm) infrastructure to communicate configuration status and sync status constantly.
* Clarification on others: Port lockdown does affect HA communication if misconfigured (A is false).
Mirroring uses separate channels (B is false). Mirroring is never sent over the serial cable because it requires high bandwidth (D is false).

NEW QUESTION # 36
A virtual server is listening at 10.10.1.100:80 and has the following iRule associated with it:
when HTTP_REQUEST { if { [HTTP::header UserAgent] contains "MSIE" }
{ pool MSIE_pool }
else { pool Mozilla_pool }
If a user connects to http://10.10.1.100/foo.html and their browser does not specify a UserAgent, which pool will receive the request?
  • A. None. The request will be dropped.
  • B. MSIE_pool
  • C. Unknown. The pool cannot be determined from the information provided.
  • D. Mozilla_pool
Answer: D

NEW QUESTION # 37
The diagram below shows the TCP connection setup for an application.

Which of the following virtual server types applies? (Choose one answer)
  • A. Stateless virtual server
  • B. Standard virtual server
  • C. Forwarding IP virtual server
Answer: C
Explanation:
Comprehensive and Detailed Explanation From BIG-IP Administration Data Plane Concepts documents:
The diagram illustrates a specific TCP handshake sequence where the BIG-IP system acts as a transparent forwarder rather than a full proxy. The key indicators that identify this as a Forwarding (IP) virtual server are as follows:
Initial Packet Processing: The diagram explicitly states that the LTM evaluates the packet looking only at the destination IP address. This is the fundamental characteristic of a Forwarding IP virtual server, which uses the system's routing table to make forwarding decisions instead of load balancing to a pool of members.
Handshake Sequence: Unlike a Standard virtual server, which completes the three-way handshake with the client (SYN, SYN-ACK, ACK) before initiating a separate connection to the server, the Forwarding IP virtual server passes the client's original SYN packet directly to the destination node.
Response Timing: The BIG-IP system waits for the SYN-ACK from the destination node before it sends a SYN-ACK back to the client. It essentially "passes through" the handshake signals while still maintaining a state entry in the connection table to track the flow.
Packet-by-Packet Logic: While it tracks the state, it does not perform address translation (unless SNAT is specifically configured) or deep packet inspection like a full proxy would.
Why other options are incorrect:
Standard virtual server: A Standard virtual server is a "full proxy." It would finish the handshake with the client first and only then open a second, independent TCP connection to the backend server.
Stateless virtual server: A stateless virtual server does not track connections in the connection table. The diagram shows the system meticulously passing sequence numbers ($seq_num$) and acknowledgment numbers ($ack_num$) between the two sides, which requires stateful tracking of the TCP flow.

NEW QUESTION # 38
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