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| Certification Vendor: | F5 |
|---|---|
| Exam Name: | BIG-IP Administration Data Plane Concepts |
| Exam Number: | F5CAB2 |
| Passing Score: | Not officially disclosed |
| Certificate Validity Period: | 3 years |
| Available Languages: | English |
| Exam Format: | Multiple choice, Scenario-based |
| Exam Price: | $50 USD |
| Related Certifications: | F5 Certified Administrator, BIG-IP |
| Real Exam Qty: | 30 |
| Exam Duration: | 30 minutes |
| Recommended Training: | BIG-IP Administration Training Courses |
| Exam Registration: | F5 Education Portal Certiverse Pearson VUE |
| Sample Questions: | F5 F5CAB2 Sample Questions |
| Exam Way: | Online proctored (Certiverse) / In-person (Pearson VUE centers) |
| Pre Condition: | No mandatory prerequisites; can take in any order with other F5CAB exams |
| Official Syllabus URL: | https://education.f5.com/exams/big-ip-administration-data-plane-concepts |
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NEW QUESTION # 42
When upgrading a BIG-IP redundant pair, what happens when one system has been updated but the other has not?
Answer: B
Explanation:
The F5 BIG-IP upgrade process for HA pairs requires a specific "staggered" approach to maintain uptime.
Configuration Sync: Because the configuration schemas between different versions are often incompatible, ConfigSync should not be performed. Attempting to sync a newer configuration to an older system (or vice-versa) can cause configuration corruption or system instability.
Failover Capability: Generally, a pair with a version mismatch can still fail over to ensure traffic continuity during the upgrade window, but administrative changes and syncs must be paused until both units are on the same version.
NEW QUESTION # 43
When using the setup utility to configure a redundant pair, you are asked to provide a "Failover Peer IP". Which address is this?
Answer: B
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: C
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 explicitly creates a traffic group on a BIG-IP device. Which two types of configuration objects can be associated with this traffic group? (Choose two.)
Answer: B,C
Explanation:
ATraffic Groupis a collection of related configuration objects that fail over together from one BIG-IP device to another. Only "floating" objects can be members of a traffic group.
* Virtual Addresses (C):A virtual address (the IP part of a Virtual Server) is a floating object. It is assigned to a traffic group so that the entire IP moves to the standby unit during a failover.
* Floating Self IPs (E):These are used as gateways for backend servers or SNAT addresses. By associating them with a traffic group, they remain reachable by the backend network regardless of which BIG-IP is currently active.
Why other options are incorrect:
* iRules (A):iRules are configuration logic files; they are synchronized across devices but are not
"hosted" by a traffic group.
* VLANs (D):VLANs are local to the hardware interfaces/trunks of each specific device and do not fail over.
NEW QUESTION # 46
A BIG-IP is configured with a pool member located on a different subnet that is not local to the BIG-IP. To ensure that the return traffic from the pool member is sent to the client through the BIG-IP, a Source NAT (SNAT) is used and configured for SNAT Automap. The BIG-IP has a default gateway on the external VLAN, a floating and non-floating self-IP address on each VLAN, and a management address. Which IP address will the BIG-IP use as the source address for the traffic to the pool member when client traffic is sent through the virtual server?
Answer: C
Explanation:
SNAT Automapis a feature that automatically selects a self-IP address to use as the source address for translated packets. The selection logic follows a strict hierarchy to ensure that traffic is routable back to the BIG-IP:
* Egress VLAN Priority:The BIG-IP first looks at the VLAN through which the traffic is exiting toward the pool member (the egress VLAN).
* Floating Self-IP Preference:If the egress VLAN has afloating self-IP address, the BIG-IP will always prefer it for SNAT Automap. This is critical for High Availability (HA) because, during a failover, the floating IP moves to the new active device, allowing existing connections to be maintained or correctly timed out.
* Non-Floating Fallback:If no floating self-IP is available on the egress VLAN, the system will use a floating self-IP from a different VLAN. If no floating IPs exist at all, it will then fall back to the non- floating self-IP.
Key Data Plane Concept:
The management IP is never used for data plane traffic. In this scenario, since the administrator has configured a floating self-IP, that specific address becomes the source for all SNAT Automap traffic leaving that VLAN to ensure symmetric routing during HA events.
NEW QUESTION # 47
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