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NEW QUESTION # 18
A Standard Virtual Server is configured with SNAT Automap. Backend servers must see the original client IP.
What should be configured?
Answer: B
Explanation:
X-Forwarded-For inserts the original client IP into HTTP headers, preserving client identity while SNAT is enabled.
NEW QUESTION # 19
In a pool there are 2 pool members (older servers) that can handle fewer connections than the other 3 newer servers.
Which load balancing method would allow more traffic to be directed to the newer servers? (Choose one answer)
Answer: C
Explanation:
This scenario requires unequal load distribution based on server capacity. The newer servers must receive more connections than the older ones, while still dynamically accounting for active connection counts.
According to BIG-IP Administration: Data Plane Configuration documentation:
* Weighted Least Connections (member) combines:
* Connection awareness (least connections)
* Administrator-defined weights (ratios) to reflect server capacity
* Pool members with higher weights receive proportionally more new connections than members with lower weights, even when using the same load balancing algorithm.
Why B is correct:
* Allows assigning higher weights to newer servers and lower weights to older servers
* Ensures smarter traffic distribution based on both capacity and real-time load Why the other options are incorrect:
* A. Global AvailabilityUsed for disaster recovery and site failover, not intra-pool load distribution.
* C. Round RobinDistributes connections evenly without considering server capacity.
* D. Least Connections (member)Balances only by current connection count and does not account for differences in server performance or capacity.
Correct Resolution:
Use Weighted Least Connections (member) and assign higher weights to newer servers so they receive more traffic while protecting older servers from overload.
NEW QUESTION # 20
Which Virtual Server type prevents the use of a default pool?
Answer: A
Explanation:
Forwarding (IP) virtual servers operate at Layer 3 and forward traffic based on routing, not pools.
NEW QUESTION # 21
A BIG-IP Administrator is creating a new Trunk on the BIG-IP device. What objects should be added to the new Trunk being created?
Answer: C
Explanation:
In F5 BIG-IP architecture, a Trunk is a logical aggregation of physical interfaces designed to increase bandwidth and provide link redundancy through 802.3ad Link Aggregation Control Protocol (LACP).
When creating a Trunk object within the BIG-IP configuration, the administrator must assign physical Interfaces to it - these are the underlying hardware ports (e.g., 1.1, 1.2, 1.3) that will be bundled together to form the aggregated logical link.
It is critical to understand the layered object hierarchy on the BIG-IP platform:
* Interfaces # assigned to Trunks
* Trunks (or individual Interfaces) # assigned to VLANs (as tagged or untagged members)
* VLANs # assigned Self IP addresses
* Self IPs / Routes # configured at the network layer above
VLANs are not added to a Trunk; rather, a Trunk is added as a member of a VLAN. IP addresses and network routes are configured independently at a higher abstraction layer and have no direct association with Trunk creation.
This layered design ensures proper separation of concerns across the data plane. Misunderstanding this hierarchy is a common configuration error that can result in traffic forwarding failures.
Reference: BIG-IP Administration - Data Plane Configuration, Module: Network Objects - Interfaces, Trunks, and VLANs.
NEW QUESTION # 22
Users report that traffic is negatively affected every time a BIG-IP device fails over. The traffic becomes stabilized after a few minutes. What should the BIG-IP Administrator do to reduce the impact of future failovers?
Answer: B
Explanation:
When a failover occurs in a standard BIG-IP High Availability (HA) pair, the newly active device takes over the floating IP addresses (Virtual Servers, Self IPs). By default, the new active device sends Gratuitous ARP (GARP) messages to the local network switch to inform it that these IP addresses are now associated with its own physical MAC addresses. However, network switches and intermediate routers often have ARP aging timers or security features that may delay the updating of their ARP tables, leading to "black-holed" traffic or dropped packets for several seconds or minutes until the network infrastructure correctly relearns the new path.
To eliminate this delay and ensure a seamless transition, a BIG-IP Administrator should Configure MAC Masquerade. MAC Masquerade allows the administrator to assign a unique, "virtual" MAC address to a specific traffic group. Instead of using the hardware-burned MAC address of the individual appliance, the active device uses this shared virtual MAC address for all communication involving floating IPs. When a failover occurs, the standby device assumes control of the traffic group and begins using the exact same virtual MAC address. Because the MAC address associated with the VIPs never changes from the switch's perspective, there is no need for the switch to update its MAC address table or for the surrounding infrastructure to update its ARP caches. This effectively eliminates the "stabilization period" reported by users, as the data plane transition happens almost instantaneously at Layer 2, maintaining continuous traffic flow without being hindered by external network re-convergence times.
NEW QUESTION # 23
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