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NEW QUESTION # 55
Which command displays current connections?
Answer: C
Explanation:
This shows active connections handled by the system.
NEW QUESTION # 56
A gateway_icmp health monitor is configured on a pool. The BIG-IP Administrator is investigating why the pool is reported as down while the server is online. Other pools with servers in the same subnet are correctly monitored.
What can cause this behavior? (Choose one answer)
Answer: B
Explanation:
A gateway_icmp monitor checks basic network reachability by sending ICMP echo requests (pings) to the pool member or its gateway. If the pool is marked DOWN while the server is confirmed to be online, the most likely cause is that ICMP traffic is being blocked.
A host-based firewall active on the server (Option C) can block ICMP echo requests or replies, preventing BIG-IP from receiving a successful response to the health check. This results in the monitor failing and the pool member being marked down, even though the server and application are otherwise functioning normally. This explanation is consistent with the scenario where other servers in the same subnet work correctly, indicating that routing and BIG-IP configuration are not the issue.
The other options are unrelated to ICMP monitoring. Logged-in users (Option A), missing patches (Option B), and stopped HTTP services (Option D) do not affect a gateway_icmp monitor. BIG-IP troubleshooting best practices recommend verifying ICMP reachability and firewall policies when diagnosing ICMP-based monitor failures.
NEW QUESTION # 57
A Standard Virtual Server for a web application is configured with Automap for the Source Address Translation option. The original source address of the client must be known by the backend servers. What should the BIG-IP Administrator configure to meet this requirement?
Answer: D
Explanation:
In complex network environments, "SNAT Automap" is frequently used to ensure that backend servers send return traffic through the BIG-IP. However, SNAT hides the original client's IP address, replacing it with the BIG-IP's self-IP. When interpreting traffic flow for security or logging purposes, backend servers often need that original IP. To resolve this without breaking the network-layer routing provided by SNAT, the administrator should apply an HTTP profile to the virtual server and enable the "Insert X-Forwarded-For" option. When this is enabled, the BIG-IP inserts a standard HTTP header containing the client's original IP address before forwarding the request to the pool member. This troubleshooting method allows the backend application to log the actual user's identity while maintaining a functional L3/L4 traffic flow where the server responds to the BIG-IP's local address. This is a standard troubleshooting solution for "web server not working as expected" scenarios where applica8tion logic depends on knowing the geography or specific identity of the connecting user.
NEW QUESTION # 58
A BIG-IP Administrator needs to view the CPU utilization of a particular Virtual Server. Which section of the Configuration Utility should the administrator use for this purpose?
Answer: C
Explanation:
When a BIG-IP system experiences high overall CPU usage, troubleshooting requires identifying which specific application or service is the primary consumer of resources. While the system-wide performance graphs provide a global view, the granular data necessary to isolate a "top talker" is found in the "Local Traffic" statistics. Navigating to Statistics > Module Statistics > Local Traffic > Virtual Servers allows the administrator to see specific metrics for each configured virtual server, including the number of packets processed, current connections, and critical CPU cycles consumed. This is essential for troubleshooting performance issues where an inefficient iRule, high SSL handshake volume, or complex L7 profiles (like Compression or ASM) might be overtaxing the Traffic Management Microkernel (TMM) for one specific application. By reviewing these basic stats, an administrator can determine if a performance bottle-neck is a system-wide hardware issue or if it is isolated to a single virtual server, enabling targeted remediation such as optimizing iRule logic or moving the high-load virtual server to a dedicated device.
NEW QUESTION # 59
A BIG-IP Administrator suspects that one of the BIG-IP device power supplies is experiencing power outages.
Which log file should the BIG-IP Administrator check to verify the suspicion? (Choose one answer)
Answer: C
Explanation:
According to official F5 documentation (K52015891 - Troubleshooting BIG-IP power supply issues), hardware-related alerts for power supplies, fans, and chassis components are logged in /var/log/ltm.
When a BIG-IP device experiences a power supply issue-such as failure, intermittent outages, or fan-related faults-the system generates alerts through internal platform monitoring services. These alerts are written to the /var/log/ltm file and often appear with messages similar to:
Chassis power supply 2 has experienced an issue. Status is as follows: FAN=bad; STATUS=bad.
This makes /var/log/ltm the authoritative log file for identifying and verifying power supply and chassis-related problems on BIG-IP systems.
The other log files are not appropriate for this purpose:
/var/log/daemon.log contains general daemon messages but is not the primary source for chassis hardware alerts.
/var/log/kern.log logs kernel-level events, not platform power status.
/var/log/audit records administrative actions and configuration changes.
Conclusion:
Per F5-supported guidance, when suspecting power supply outages or chassis hardware issues, the BIG-IP Administrator should always check /var/log/ltm first.
NEW QUESTION # 60
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