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Difficulty: MediumFirst Hop Redundancy Protocols (HSRP and VRRP)

A network administrator is evaluating default gateway redundancy protocol behavior on Cisco IOS switches for VLAN 10 (192.168.10.0/24192.168.10.0/24). Which two statements accurately contrast the default operational features of HSRPv1 and VRRPv2? (Choose two.)

  1. VRRPv2 enables preemption by default, whereas HSRPv1 disables preemption by default.Answer
  2. HSRPv1 uses virtual MAC addresses formatted as 0000.0c07.acXX, whereas VRRPv2 uses virtual MAC addresses formatted as 0000.5e00.01XX.Answer
  3. C
    HSRPv1 allows assigning an active physical interface IP address as the virtual IP address, whereas VRRPv2 forbids matching the virtual IP to any physical interface IP.
  4. D
    VRRPv2 designates the active forwarding router as the Active router, whereas HSRPv1 designates it as the Master router.

Answer

VRRPv2 enables preemption by default while HSRPv1 disables it by default, and HSRPv1 uses virtual MAC addresses in the format 0000.0c07.acXX while VRRPv2 uses 0000.5e00.01XX.
The correct statements accurately identify key default operational differences between Cisco proprietary HSRPv1 and open standard VRRPv2: VRRPv2 preemption is enabled by default while HSRPv1 preemption is disabled by default, and HSRPv1 uses the virtual MAC structure 0000.0c07.acXX compared to VRRPv2's 0000.5e00.01XX.

Step-by-Step Solution

1
Analyze preemption defaults for HSRPv1 and VRRPv2.
HSRPv1 requires explicit configuration of preemption to allow a higher priority router to claim the Active role. VRRPv2 has preemption enabled natively out of the box.
Understanding protocol default behaviors is essential for predicting failover and failback behavior during topology changes.
2
Analyze Virtual MAC address structures.
HSRPv1 uses vendor MAC prefix 0000.0c07.acXX, while VRRPv2 uses standard MAC prefix 0000.5e00.01XX.
Virtual MAC formatting allows Layer 2 switch forwarding tables to map the default gateway IP to the virtual router.
3
Evaluate role terminology and physical IP assignment constraints.
HSRP uses Active/Standby terminology and forbids virtual IP overlap with interface IPs. VRRP uses Master/Backup terminology and allows IP address ownership (priority 255).
This rules out distractors that swap role terminology or misstate virtual IP assignment capabilities.

Key Concept

First Hop Redundancy Protocols Default Features and Architectural Comparison
Estimated Time:1m 30s
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Topics

First Hop Redundancy Protocols (HSRP and VRRP)

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