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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Local Traffic Management (LTM) | 30% | - Pools and pool members - SSL profiles and offloading - iRules and persistence profiles - Load balancing modes - Health monitors and monitory types - Virtual servers (Standard, Performance L4, Forwarding) |
| Topic 2: Troubleshooting and Support | 25% | - SNMP and monitoring - Performance and resource monitoring - iRules debugging - tcpdump and network capture - Common troubleshooting scenarios - Logging and log configuration |
| Topic 3: Architecture and Components | 15% | - BIG-IP system architecture - Device service clustering (DSC) - Traffic flow and packet processing - High availability (HA) configurations |
| Topic 4: Initial Setup and Configuration | 20% | - NTP and DNS configuration - Network failover setup - Network configuration (VLANs, Self IPs, Routes) - User management and role-based access - Initial provisioning (Provisioning, License) |
| Topic 5: Security and Access | 10% | - Role-based access control (RBAC) - Packet filtering - User authentication (Remote Auth, LDAP, RADIUS) - SSL/TLS configuration |
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NEW QUESTION # 63
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: C
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 # 64
A BIG-IP Administrator adds new Pool Members into an existing, highly utilized pool. Soon after, there are reports that the application is failing to load for some users. What pool level setting should the BIG-IP Administrator check?
Answer: A
Explanation:
When troubleshooting a pool that is not working correctly after adding new members, the "Slow Ramp Time" setting is a primary suspect. In a pool that is already under high load and using a "Least Connections" load balancing method, a newly added server has zero connections. Without a slow ramp time, the BIG-IP will immediately direct a massive flood of new connections to the new server to "balance" it with the others. This
"thundering herd" effect can crash a newly initialized application server before it has time to warm up its caches or establish its own database connections. By setting a "Slow Ramp Time" (typically in seconds), the administrator ensures the BIG-IP gradually increases the connection ratio to the new member. This allows the server to stabilize and scale up its performance over time. If users report intermittent failures specifically coinciding with the expansion of a pool, checking this setting is a vital troubleshooting step to maintain pool health during maintenance.
NEW QUESTION # 65
A user needs to determine known security vulnerabilities on an existing BIG-IP appliance and how to remediate these vulnerabilities. Which action should the BIG-IP Administrator recommend?
Answer: C
Explanation:
F5 recommends using the iHealth diagnostic tool to identify security vulnerabilities and receive specific remediation guidance.
QKView and iHealth: A QKView file is a comprehensive diagnostic snapshot of the BIG-IP system. When this file is uploaded to the F5 iHealth portal, it is automatically parsed against a database of known issues and security advisories.
Vulnerability Diagnosis: The iHealth platform includes automated checks specifically designed to surface security gaps and "Heuristics" that match the system's current configuration and software version to known CVEs (Common Vulnerabilities and Exposures).
Remediation Guidance: For every identified vulnerability, iHealth provides direct links to the relevant F5 Security Advisory (K-article), which contains detailed remediation steps, such as specific software versions that contain a fix or temporary mitigation commands.
UCS vs. QKView: While a UCS (User Configuration Set) file is a backup of the system configuration, it is not the format used by the iHealth diagnostic engine for automated vulnerability scanning; the QKView is the required format for this process.
NEW QUESTION # 66
A BIG-IP Administrator observes the following pool member status message:
Pool /Common/testpool member /Common/10.120.0.5:8090 monitor status down
[/Common/http: up, /Common/http2: down; last error:]
Why is this pool member being marked down? (Choose one answer)
Answer: C
Explanation:
The pool member is marked DOWN because it is monitored by multiple health monitors, specifically an HTTP monitor and an HTTP/2 monitor. The status message clearly shows that the HTTP monitor is UP, while the HTTP/2 monitor is DOWN. In BIG-IP, when multiple monitors are assigned to a pool member, the default behavior is AND logic, meaning all assigned monitors must succeed for the pool member to be considered healthy.
In this scenario, the server is responding successfully to standard HTTP (likely HTTP/1.1) requests but does not support or respond correctly to HTTP/2 requests. As a result, the HTTP/2 monitor fails, which causes the overall monitor status to be DOWN, even though HTTP traffic itself is working.
This behavior is expected and documented in BIG-IP monitoring logic. Unless the monitor rule is explicitly changed to "at least one of", a single failing monitor will mark the pool member down. Therefore, the correct conclusion is that the pool member is only serving HTTP traffic, not HTTP/2.
The resolution would be to either remove the HTTP/2 monitor, correct the application to support HTTP/2, or adjust the monitor rule to match the intended health-check logic.
NEW QUESTION # 67
Which command is used to capture traffic on BIG-IP?
Answer: C
Explanation:
tcpdump is the primary CLI tool for capturing and analyzing network packets.
NEW QUESTION # 68
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