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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: High Availability Concepts | 15% | - Redundancy and failover basics - HA architecture and principles |
| Topic 2: Traffic Behavior Analysis | 35% | - Configuration-based traffic behavior
|
| Topic 3: ADC Application Objects & Virtual Servers | 20% | - Core ADC object fundamentals - Virtual server types
|
| Topic 4: Networking Components & Relationships | 30% | - Interfaces, trunks, VLANs, self-IPs, routes
|
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NEW QUESTION # 41
The BIG-IP Administrator needs to ensure that if a pool member is marked down by the monitor, the BIG-IP system sends existing connections to another available pool member. Which task should the BIG-IP Administrator perform to meet this goal?
Answer: B
Explanation:
By default, when a pool member is marked "down" by a monitor, the BIG-IP system stops sendingnew connections to that member, but it typically allows existing connections to time out naturally (or resets them depending on profile settings).
* Action on Service Down:This setting is configured at thePoollevel.
* Reselect:When set toReselect, if a pool member is marked down, the BIG-IP system will immediately attempt to pick a different available pool member for any existing, active connections associated with the failed member.
* Client Experience:This is used to maintain the user session by transparently moving the traffic to a healthy server without the client needing to re-establish the connection to the Virtual Server.
NEW QUESTION # 42
A BIG-IP Administrator has a cluster of devices.
What should the administrator do after creating a new Virtual Server on device 1? (Choose one answer)
Answer: C
Explanation:
Comprehensive and Detailed Explanation (BIG-IP Administration - Data Plane Concepts):
In a BIG-IP device service cluster, configuration objects such as virtual servers, pools, profiles, and iRules are maintained through configuration synchronization (config-sync).
Key BIG-IP concepts involved:
Device Service Cluster (DSC)
A cluster is a group of BIG-IP devices that share configuration data. One device is typically used to make changes, which are then synchronized to the rest of the group.
Config-Sync Direction Matters
Changes are made on a local device
Those changes must be pushed to the group
The correct operation is "Sync Device to Group"
Why C is correct:
The virtual server was created only on device 1
Other devices in the cluster do not yet have this object
To propagate the new virtual server to all cluster members, the administrator must synchronize device 1 to the group Why the other options are incorrect:
A . Synchronize the settings of the group to device 1
This would overwrite device 1's configuration with the group's existing configuration and may remove the newly created virtual server.
B . Create a new cluster on device 1
The cluster already exists. Creating a new cluster is unnecessary and disruptive.
D . Create a new virtual server on device 2
This defeats the purpose of centralized configuration management and risks configuration drift.
Conclusion:
After creating a new virtual server on a BIG-IP device that is part of a cluster, the administrator must synchronize the configuration from that device to the group so all devices share the same ADC application objects.
NEW QUESTION # 43
What is the result when a BIG-IP Administrator manually disables a pool member? (Choose one answer)
Answer: C
Explanation:
In BIG-IP LTM, a pool member state directly affects how traffic is handled at the data plane level. When a pool member is manually disabled, BIG-IP changes the member's availability state to disabled, which has specific and predictable traffic-handling consequences.
According to BIG-IP Administration Data Plane Concepts:
* A disabled pool member:
* Does not accept new connections
* Continues to process existing non-persistent connections until they naturally close
* Is removed from load-balancing decisions, including persistence lookups Most importantly for this question:
* Persistent connections (such as those created using source-address persistence, cookie persistence, or SSL persistence) are not honored for a disabled pool member
* BIG-IP will not send new persistent traffic to a disabled member, even if persistence records exist Therefore, when a pool member is manually disabled, it stops processing persistent connections, while allowing existing non-persistent flows to drain gracefully.
Why the Other Options Are Incorrect:
* B - Persistent connections are not honored for a disabled pool member
* C - Existing connections are not immediately terminated when a pool member is disabled
* D - Only the disabled pool member stops accepting new connections, not all pool members Key Data Plane Concept Reinforced:
Manually disabling a pool member is a graceful administrative action that prevents new and persistent traffic from reaching the member while allowing existing connections to complete, which is critical for maintenance and troubleshooting scenarios.
NEW QUESTION # 44
Which virtual server type is being configured in the screenshot? (Choose one answer.)
Answer: B
Explanation:
Comprehensive and Detailed Explanation (BIG-IP Administration - Data Plane Concepts):
The configuration shown matches a Performance Layer 4 virtual server because it is explicitly using a FastL4 profile:
The screenshot shows Protocol: TCP and Protocol Profile (Client): fastL4.
In BIG-IP data plane terms, FastL4 is the hallmark of a Performance (Layer 4) virtual server, designed to process connections at Layer 4 with minimal overhead (high throughput/low latency) compared to full proxy L7 processing.
The screenshot also shows HTTP Profile (Client): None (and HTTP server profile effectively not in use).
A Standard virtual server commonly uses full-proxy features and frequently includes L7 profiles (like HTTP) when doing HTTP-aware load balancing, header manipulation, cookie persistence, etc. In contrast, a Performance L4 virtual server typically does not use an HTTP profile because it is not doing HTTP-aware (Layer 7) processing.
It is not a Forwarding IP virtual server:
A Forwarding (IP) virtual server is used to route/forward packets (often without load balancing to pool members in the same way as Standard/Performance VS) and is selected by choosing a forwarding type. The presence of a TCP protocol with a FastL4 client profile aligns with a Layer 4 load-balancing style virtual server, not a packet-forwarding virtual server type.
Conclusion: Because the configuration is TCP-based and explicitly uses fastL4 with no HTTP profile, the expected BIG-IP virtual server type is Performance Layer 4 (Option C).
NEW QUESTION # 45
Refer to the exhibit.
During a planned upgrade to a BIG-IP HA pair running Active/Standby, an outage to application traffic is reported shortly after the Active unit is forced to Standby. Reverting the failover resolves the outage. What should the BIG-IP Administrator modify to avoid an outage during the next failover event? (Choose one answer)
Answer: B
Explanation:
Comprehensive and Detailed Explanation (BIG-IP Administration - Data Plane Concepts):
In an Active/Standby BIG-IP design, application availability during failover depends on both units having equivalent data-plane connectivity for the networks that carry application traffic. Specifically:
VLANs are bound to specific interfaces (and optionally VLAN tags).
Floating self IPs / traffic groups move to the new Active device during failover.
For traffic to continue flowing after failover, the new Active device must have the same VLANs available on the correct interfaces that connect to the upstream/downstream networks.
What the symptom tells you:
Traffic works when Device A is Active
Traffic fails when Device B becomes Active
Failback immediately restores traffic
This pattern strongly indicates the Standby unit does not have the VLAN connected the same way (wrong physical interface assignment), so when it becomes Active, it owns the floating addresses but cannot actually pass traffic on the correct network segment.
Why Interface mismatch is the best match:
If the Active unit is already working, its interface mapping is correct.
The fix is to make the Standby unit's VLAN/interface assignment match the Active unit.
That corresponds to changing the Standby device interface to 1.1.
Why the Tag options are less likely here (given the choices and the exhibit intent):
Tag issues can also break failover traffic, but the question/options are clearly driving toward the classic HA requirement: consistent VLAN-to-interface mapping on both devices so the data plane remains functional after the traffic group moves.
Conclusion: To avoid an outage on the next failover, the BIG-IP Administrator must ensure the Standby device uses the same interface (1.1) for the relevant VLAN(s) that carry the application traffic, so when it becomes Active it can forward/receive traffic normally.
NEW QUESTION # 46
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