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| Section | Weight | Objectives |
|---|---|---|
| High Availability Concepts | 15% | - Redundancy and failover basics - HA architecture and principles |
| Networking Components & Relationships | 30% | - Interfaces, trunks, VLANs, self-IPs, routes
|
| Traffic Behavior Analysis | 35% | - Configuration-based traffic behavior
|
| ADC Application Objects & Virtual Servers | 20% | - Virtual server types
|
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NEW QUESTION # 43
What are two features of an application delivery controller (ADC)?
Pick the 2 correct responses below.
Answer: C,D
Explanation:
An Application Delivery Controller (ADC) provides application traffic-management functions between clients and application servers. Two fundamental ADC capabilities represented here are SSL offloading and load balancing.
SSL offloading allows the BIG-IP system to terminate client-side SSL/TLS connections and perform the cryptographic processing that would otherwise consume application-server resources. F5 specifically describes SSL offload as the BIG-IP system performing the SSL handshake and encryption/decryption functions normally performed by the destination server. Client SSL profiles are commonly applied to virtual servers to implement this functionality.
Load balancing is another core ADC function. BIG-IP LTM uses pools and configured load-balancing algorithms to select an appropriate pool member for each connection or request. For example, with Round Robin, BIG-IP distributes incoming requests sequentially across available pool members. F5 identifies the load-balancing method as a fundamental property of a server pool.
Log collecting can occur as part of system administration and telemetry, but it is not one of the fundamental ADC functions being tested here. Screen sharing is an end-user collaboration capability and has no role in ADC traffic delivery.
Study Guide Reference/Topics: Application Delivery Controller Functions; SSL/TLS Offload; Virtual Servers and SSL Profiles; Pools; Load-Balancing Methods.
NEW QUESTION # 44
The BIG-IP Administrator wants to provide quick failover between the F5 LTM devices that are configured in an HA Pair with a single traffic-group. The BIG-IP Administrator wants to implement the Mac Masquerade feature for this quick failover and run this command: tmsh modify /cm traffic-group traffic-group-1 mac 02:
12:34:56:00:00. However, the Network Operations team has identified an issue with the use of the same MAC address being used within different VLANs. As a result of this, the BIG-IP Administrator must implement the Per-VLAN Mac Masquerade in order to have a unique MAC address on each VLAN: tmsh modify /sys db tm.
macmasqaddr_per_vlan value true. What would be the resulting MAC address on a tagged VLAN of 1501?
Answer: D
Explanation:
MAC Masquerade allows a traffic group to use a shared MAC address to speed up failover. When the system DB variable tm.macmasqaddr_per_vlan is enabled, the BIG-IP generates a unique MAC address for each VLAN by algorithmically modifying the base MAC address using theVLAN ID.
The calculation forVLAN 1501works as follows:
* Base MAC:The administrator set the base to 02:12:34:56:00:00.
* VLAN ID Conversion:The decimal VLAN ID (1501) must be converted into hexadecimal.
* $1501 \div 16 = 93$ remainder13(Din hex)
* $93 \div 16 = 5$ remainder13(Din hex)
* $5 \div 16 = 0$ remainder5
* Result: $1501$ (Decimal) =05DD(Hex).
* Substitution:The BIG-IP replaces the last two octets of the base MAC address with the hexadecimal representation of the VLAN ID.
* Final Result:02:12:34:56:05:dd.
NEW QUESTION # 45
A BIG-IP Administrator needs to apply a health monitor for a pool of database servers named DB_Pool that uses TCP port 1521.
Where should the BIG-IP Administrator apply this monitor?
Answer: C
NEW QUESTION # 46
A BIG-IP Administrator is conducting maintenance on one BIG-IP appliance in an HA Pair. Why should the BIG-IP Administrator put the appliance into FORCED-OFFLINE state?
Answer: D
Explanation:
TheForced Offlinestate is a critical administrative tool used during maintenance to ensure a device remains in a non-functional state relative to the traffic group.
* Preventing Active Status:When a device is in "Forced Offline," it is effectively disqualified from the HA election process. Even if the other peer fails, a device in Forced Offline willnotbecome active. This is vital during maintenance (like firmware upgrades or hardware replacement) to prevent an unstable or half-configured device from attempting to process traffic.
* Traffic Termination:Placing a device in Forced Offline triggers the system to stop accepting new connections and, depending on the configuration, can facilitate the termination of existing connections so that the administrator can perform work without the data plane actively utilizing system resources.
* Persistence Handling:Unlike the "Disabled" state, Forced Offline ignores persistence records, ensuring that no new traffic is steered to the device via session affinity.
NEW QUESTION # 47
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: C
Explanation:
In anActive/StandbyBIG-IP design, application availability during failover depends on both units having equivalent data-plane connectivityfor the networks that carry application traffic. Specifically:
* VLANs are bound to specific interfaces (and optionally VLAN tags).
* Floating self IPs / traffic groupsmove to the new Active device during failover.
* For traffic to continue flowing after failover, the new Active device must have thesame VLANs available on the correct interfacesthat 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 theStandby 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.
WhyInterface mismatchis the best match:
* If theActiveunit is already working, its interface mapping is correct.
* The fix is to make theStandbyunit's VLAN/interface assignment match the Active unit.
* That corresponds tochanging the Standby device interface to 1.1.
Why theTagoptions 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 devicesso 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 thesame 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 # 48
......
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