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| Section | Weight | Objectives |
|---|---|---|
| Local Traffic Management (LTM) | 30% | - Pools and pool members - iRules and persistence profiles - Health monitors and monitory types - Virtual servers (Standard, Performance L4, Forwarding) - SSL profiles and offloading - Load balancing modes |
| Security and Access | 10% | - Role-based access control (RBAC) - SSL/TLS configuration - User authentication (Remote Auth, LDAP, RADIUS) - Packet filtering |
| Initial Setup and Configuration | 20% | - Initial provisioning (Provisioning, License) - Network configuration (VLANs, Self IPs, Routes) - User management and role-based access - Network failover setup - NTP and DNS configuration |
| Architecture and Components | 15% | - BIG-IP system architecture - Traffic flow and packet processing - Device service clustering (DSC) - High availability (HA) configurations |
| Troubleshooting and Support | 25% | - Common troubleshooting scenarios - Performance and resource monitoring - Logging and log configuration - SNMP and monitoring - tcpdump and network capture - iRules debugging |
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NEW QUESTION # 36
Which command shows routing table?
Answer: A
Explanation:
Displays routes used for packet forwarding decisions.
NEW QUESTION # 37
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: D
Explanation:
When adding new members to an active, high-traffic pool, the Slow Ramp Time setting is critical for maintaining application stability.
* Mechanism: The Slow Ramp Time feature (located in the Pool properties) allows the BIG-IP system to gradually increase the number of connection requests sent to a newly added or recently enabled pool member.
* The Issue: In a highly utilized pool, if Slow Ramp Time is set to 0 (the default), the BIG-IP immediately begins sending a proportional share of traffic to the new members. If the application requires a "warm-up" period (e.g., to build local caches or establish database connection pools), the sudden influx of traffic can overwhelm the new server, causing it to drop requests or fail to load content for users.
* Recommendation: F5 recommends setting a non-zero Slow Ramp Time (measured in seconds) to allow the new member to scale up its processing capacity incrementally.
NEW QUESTION # 38
Plaintext
warning tmm[<pid>]: 011e0002:4: sweeper_segment_cb_any: Aggressive mode /Common/default-eviction- policy activated (0) (global memory). (345209/690176 pages) warning tmm[<pid>]: 011e0003:4: Aggressive mode sweeper: /Common/default-eviction-policy (0) (global memory) 1 Connections killed What is happening when the BIG-IP Administrator sees the messages in the LTM log displayed above? (Pick the 2 correct responses below)
Answer: A,D
Explanation:
These log messages indicate that the BIG-IP system is under significant resource pressure and has activated its Adaptive Connection Management.
* Global Eviction Policy: The message Aggressive mode ... activated (global memory) confirms that the system has reached a memory utilization threshold that triggers the eviction policy. This happens because TMM (the data plane) is running low on available memory pages.
* Sweeper/Reaping: Once in "Aggressive mode," the BIG-IP "sweeper" starts reaping (terminating) connections to free up memory. The log Connections killed confirms this is occurring.
* Impact: The system does not drop all connections; it targets connections based on the eviction policy (e.g., oldest connections or those exceeding limits) to bring memory usage back to safe levels. Thus, some connections will be dropped (Option A), and the cause is TMM memory exhaustion (Option C).
NEW QUESTION # 39
A BIG-IP Administrator needs to determine why only one pool member is showing connections from the virtual server, resulting in uneven load balancing. What two reasons would cause uneven load balancing? (Choose two answers)
Answer: C,D
Explanation:
Uneven load balancing on a BIG-IP system typically occurs when traffic is not distributed evenly across all available pool members. One common reason is thatmonitors have marked down multiple pool members (Option B). When health monitors fail for specific pool members, BIG-IP automatically removes those members from load-balancing decisions. As a result, traffic is sent only to the remaining healthy member, creating the appearance that load balancing is not functioning correctly.
This behavior is expected and aligns with BIG-IP's design to ensure traffic is sent only to healthy resources.
Another frequent cause isthe presence of a persistence profile on the pool or virtual server (Option C). Persistence (such as source address or cookie persistence) forces subsequent client connections to be sent to the same pool member for session continuity. While persistence is critical for certain applications, it can override the load-balancing algorithm and cause most or all traffic to be directed to a single pool member, especially during low traffic volumes or testing scenarios.
NEW QUESTION # 40
Pool /Common/testpool member /Common/10.120.0.5:8090 monitor status down. [ /Common/http: up,
/Common/http2: down; last error: ] [ was up for lhr:0min:43sec ]
Why is this pool member being marked down?
Answer: D
Explanation:
This log entry indicates that multiple monitors are assigned to the pool member, and the member is failing one of them.
* Understanding Monitor Logic: By default, if multiple monitors are assigned to a pool or pool member without a "Minimum To Up" (Availability Requirement) setting, the system requires all monitors to pass for the member to be marked "Up".
* Analyzing the Log: The log clearly states: [ /Common/http: up, /Common/http2: down; ... ]. This means the standard HTTP monitor is successful, indicating the member is serving HTTP traffic, but the
http2 monitor has failed.
* Conclusion: Since the http monitor is "up" but the member as a whole is "down," we can conclude the member is successfully responding to standard HTTP requests but not HTTP2 requests. Therefore, the member is currently only serving standard HTTP traffic.
NEW QUESTION # 41
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