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| Section | Weight | Objectives |
|---|---|---|
| Local Traffic Management (LTM) | 30% | - Load balancing modes - Health monitors and monitory types - Pools and pool members - iRules and persistence profiles - Virtual servers (Standard, Performance L4, Forwarding) - SSL profiles and offloading |
| Troubleshooting and Support | 25% | - Performance and resource monitoring - Common troubleshooting scenarios - SNMP and monitoring - iRules debugging - Logging and log configuration - tcpdump and network capture |
| Security and Access | 10% | - Role-based access control (RBAC) - SSL/TLS configuration - Packet filtering - User authentication (Remote Auth, LDAP, RADIUS) |
| Architecture and Components | 15% | - High availability (HA) configurations - Traffic flow and packet processing - BIG-IP system architecture - Device service clustering (DSC) |
| Initial Setup and Configuration | 20% | - Network failover setup - Initial provisioning (Provisioning, License) - NTP and DNS configuration - Network configuration (VLANs, Self IPs, Routes) - User management and role-based access |
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NEW QUESTION # 77
A custom HTTP monitor is failing to a pool member 10.10.3.75:8080 that serves up www.example.com. A ping works to the pool member address. The SEND string is: GET / HTTP/1.1 \r\nHost: www.example.
com\r\nConnection: Close\r\n\r\n. Which CLI tool syntax will show whether the web server returns the correct HTTP response?
Answer: D
Explanation:
To manually verify a health monitor's "Send String" from the BIG-IP command line, the curl utility is the preferred tool because it allows for custom header insertion.
* Matching the Monitor String: The monitor string requires an HTTP/1.1 request which must include a
"Host" header. Option A correctly uses the --header (or -H) flag to pass Host: www.example.com to the specific IP and port of the pool member.
* Troubleshooting Logic: If curl --header 'Host: www.example.com' 'http://10.10.3.75:8080/' returns a
"200 OK" but the BIG-IP monitor still shows "Down," the administrator should check if the Receive String in the monitor configuration matches the output provided by curl.
* Invalid Syntax: Option D is incorrect because it tries to append the hostname to the URI path, which the web server will likely reject with a "404 Not Found". tracepath (Options B and C) is a path discovery tool similar to traceroute and cannot validate HTTP response content.
NEW QUESTION # 78
In the BIG-IP Configuration Utility, a user requests a single screen view to determine the status of all Virtual Servers and associated pool members, as well as any iRules in use. Where should the BIG-IP Administrator instruct the user to find this view?32
Answer: A
Explanation:
Comprehensive and Detailed Explanation From BIG-IP A41dministration Support and Troubleshooting documents:To confirm functionality across a complex environment, the "Network Map" is the most efficient troubleshooting tool in the Configuration Utility43. It provides a hierarchical, visual representation of the traffic management objects44. A single glance allows the administrator to see the status of a Virtual Server (Green/Red/Yellow), the status of its associated pool, the health of individual pool members, and which iRules are currently attached45. This view is superior to the standard "Virtual Server List" for troubleshooting because it maps the dependencies between objects46. For example, if a Virtual Server is "Red," the Network Map will show if that status is inherited from a failed pool or a specific monitor failing on a pool member.
Reviewing these basic stats in the Network Map helps the administrator quickly isolate whether a failure is at the service level (Virtual Server), the logic level (iRule), or the hardware level (Pool Member).
NEW QUESTION # 79
A BIG-IP Administrator makes a configuration change to a Virtual Server on the Standby device of an HA pair. The HA pair is currently configured with Auto-Sync Enabled. What effect will the change have on the HA pair configuration?
Answer: B
Explanation:
Understanding High Availability (HA) synchronization behavior is critical for maintaining a stable environment. In a device group where "Auto-Sync" is enabled, the BIG-IP system monitors the management plane for any configuration updates across all members. While best practices often suggest making changes on the "Active" device, TMOS allows changes on any device within the group. When a change is made on the "Standby" device, the system detects a configuration mismatch and, because Auto-Sync is enabled, it automatically pushes those changes to the other devices in the sync group, including the current Active member. To troubleshoot if this is working correctly, the administrator should review the "Sync Status" stats in the Configuration Utility. If the changes do not propagate, it suggests a breakdown in the HA trust relationship or network connectivity issues on the failover VLAN. Proper interpretation of this scenario confirms that the HA functionality is operating correctly, ensuring that both devices have a consistent set of virtual servers and pools, which is vital for seamless failover.
NEW QUESTION # 80
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: A
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 # 81
Refer to the exhibit.
A pool member fails the monitor checks for about 30 minutes and then starts passing the monitor checks. New traffic is NOT being sent to the pool member. What is the likely reason for this problem? (Choose one answer)
Answer: C
Explanation:
In BIG-IP LTM, health monitors are used to determine if a pool member or node is "Up" and capable of processing traffic. Based on the provided exhibit, the specific configuration setting causing this behavior is Manual Resume.
Manual Resume (Enabled/Yes): When the Manual Resume setting is set to Yes, it changes the default behavior of how a pool member returns to service. Under normal circumstances (Manual Resume set to No), once a pool member starts passing its health check again, the BIG-IP system automatically marks it as "Up" and resumes sending traffic to it. However, with Manual Resume enabled, the system will continue to mark the pool member as "Down" (or "Unavailable") even after it passes the health check. It requires a manual intervention by an administrator to reset the status and allow traffic to flow again.
Exhibit Analysis: The screenshot clearly shows the Manual Resume radio button is selected as Yes. This explains why, even after the pool member "starts passing the monitor checks," it does not receive new traffic.
Incorrect Options Analysis:
Time Until Up (0 seconds): This setting defines how long a member must consistently pass health checks before being marked "Up." If it is set to 0, it should actually return to service immediately upon the first successful check.
The pool member is disabled: While a disabled member won't receive traffic, the question focuses on why passing a monitor check didn't restore service, which points specifically to the monitor configuration shown.
Monitor Type is TCP Half Open: This is simply the method used to check the service (sending a SYN and expecting a SYN-ACK, then sending a RST). It determines how the check is performed, not what happens after the check succeeds.
https://my.f5.com/manage/s/article/K83316932
NEW QUESTION # 82
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