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NEW QUESTION # 55
A BIG-IP Administrator receives reports from users that SSL connections to the BIG-IP device are failing. Upon checking the log files, the administrator notices: SSL transaction (TPS) rate limit reached. stats show a maximum of 1200 client-side SSL TPS and 800 server-side SSL TPS.
What is the minimum SSL license limit required to handle this peak?
Answer: D
Explanation:
Troubleshooting failed SSL handshakes involves interpreting the resource limits defined by the system's license. The log message SSL transaction (TPS) rate limit reached indicates the BIG-IP is dropping SSL connections because it has exceeded its licensed "Transactions Per Second" capacity. When analyzing stats to determine the correct license level, the administrator must focus on "Client- side" SSL TPS. This represents the initial encrypted handshakes between users and the BIG-IP virtual servers91. In this scenario, the peak client-side demand is 1200 TPS.
While the 800 server-side transactions represent re-encryption toward the backend, F5's primary SSL TPS license limits typically apply to the client-facing side of the traffic flow. Therefore, to resolve the intermittent connectivity issues and ensure the virtual server works reliably during peaks, the license must be upgraded to at least 1200 TPS. Confirming this peak via statistics andcomparing it to the current license is a standard troubleshooting step for SSL performance issues.
NEW QUESTION # 56
A BIG-IP Administrator configured the following virtual server to pass traffic on all addresses and ports. After configuration is completed, the BIG-IP Administrator notices that the virtual server is unable to pass traffic.
ltm virtual forwarding_any_vs {
destination 0.0.0.0:any
ip-forward
mask 255.255.255.255
profiles {
fastL4 { }
}
serverssl-use-sni disabled
source 0.0.0.0/0
translate-address disabled
translate-port disabled
}
Which part of the configuration is the cause of the issue? (Choose one answer)
Answer: B
Explanation:
This virtual server is intended to function as a forwarding (IP-forwarding) virtual server, which is commonly used for routing or firewall-style deployments where BIG-IP forwards traffic transparently without load balancing or address translation. For a forwarding virtual server to match and pass all traffic, the destination must be configured as 0.0.0.0:any with a mask of 0.0.0.0, not 255.255.255.255.
The configured mask 255.255.255.255 represents a /32 host mask, which restricts the virtual server to matching traffic destined only for the exact IP address 0.0.0.0. Since 0.0.0.0 is not a valid routable destination for normal traffic, no packets will ever match the virtual server, causing it to pass no traffic at all.
This is a well-documented BIG-IP behavior:
destination 0.0.0.0:any
mask 0.0.0.0
together define a catch-all forwarding virtual server.
The destination itself (Option A) is correct for a forwarding VS, and disabling address translation (Option C) is expected and required for IP-forwarding mode. Therefore, the incorrect subnet mask is the sole reason the virtual server is not functioning as expected.
NEW QUESTION # 57
In an F5 BIG-IP system, a pool is configured with a health monitor and the "Manual Resume" feature is Enabled. If a pool member is marked Offline (Red) due to a health monitor failure, what will be the status of the member once the health monitor successfully passes again?
Answer: B
Explanation:
The "Manual Resume" feature is a safety mechanism used when a pool is not working as expected due to flapping services or unstable backend applications. Normally, when a health monitor fails, the pool member is marked "Offline" (Red), and when the monitor passes, it automatically returns to "Available" (Green)47. However, if "Manual Resume" is enabled, the BIG-IP will not automatically put the member back into rotation after a failure48. Even if the health check begins to pass again, the member remains in an "Offline (Disabled)" state49. This requires an administrator to manually intervene and re-enable the member. This is a common point of confusion when troubleshooting; a member may show passing health checks but still not receive traffic because it is waiting for a manual administrative "resume" command. This feature is intended to prevent "unhealthy" servers from receiving traffic until an engineer has confirmed the root cause of the initial failure was resolved.
NEW QUESTION # 58
A user wants to use the iHealth Upgrade Advisor to determine any issues with upgrading TMOS. Where can the user generate the QKView to upload to iHealth?
Answer: C
Explanation:
To utilize the F5 iHealth service, a BIG-IP Administrator must generate a diagnostic snapshot of the system known as a QKView file.
* GUI Path: In the BIG-IP Configuration Utility (GUI), the QKView generation tool is located under System > Support.
* Process: On the Support page, the user selects the "New Support Snapshot" button. From there, they ensure "QKView" is selected. Once the BIG-IP finishes collecting the data (which includes logs, configuration, and hardware statistics), the user can download the resulting .qkview file directly to their local machine.
* iHealth Integration: This file is then uploaded to ihealth.f5.com. The Upgrade Advisor tool within iHealth specifically parses this QKView to check the current configuration against known bugs, hardware limitations, or syntax changes in the target TMOS version.
* Evaluation of Other Options:
* System > Configuration (Option B): This section contains general system settings like DNS, NTP, and SNMP, but does not contain diagnostic tools.
* System > Software Management (Option C): This is where new TMOS images (.iso files) are uploaded and installed, but it is not used for generating diagnostic reports.
* System > Archives (Option D): This is used to create and manage UCS (User Configuration Set) files, which are full system backups. While UCS files contain configuration, they do not contain the deep diagnostic logs and hardware stats required by iHealth for an Upgrade Advisor analysis.
NEW QUESTION # 59
Without decrypting, what portion of an HTTPS session is visible with a packet capture? (Choose one answer)
Answer: C
Explanation:
In an HTTPS session, the application-layer payload-including HTTP request headers, response headers, cookies, and body content-is encrypted using SSL/TLS. Without decrypting the traffic (for example, without SSL offloading on BIG-IP or access to the private keys), a packet capture cannot reveal any HTTP-level details.
However, network-layer and transport-layer information remains visible, even when encryption is used. This includes source and destination IP addresses, source and destination ports, TCP flags, sequence numbers, and TLS handshake metadata. Therefore, the source IP address (Option B) is visible in a packet capture of HTTPS traffic without decryption.
Options A, C, and D are incorrect because HTTP headers and cookies are part of the encrypted payload once HTTPS is established. BIG-IP troubleshooting documentation emphasizes this distinction when analyzing encrypted traffic flows using tcpdump, as administrators must rely on IP, port, and timing information unless SSL inspection or decryption is configured.
NEW QUESTION # 60
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