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What is a valid HSRP virtual MAC address?
A. 0000.5E00.01A3
B. 0007.B400.AE01
C. 0000.0C07.AC15
D. 0007.5E00.B301
Answer: C
Explanation:
With HSRP, two or more devices support a virtual router with a fictitious MAC address and unique IP address. There are two version of HSRP.
+ With HSRP version 1, the virtual router’s MAC address is 0000.0c07.ACxx , in which xx is the HSRP group.
+ With HSRP version 2, the virtual MAC address if 0000.0C9F.Fxxx, in which xxx is the HSRP group.
Note: Another case is HSRP for IPv6, in which the MAC address range from 0005.73A0.0000 through 0005.73A0.0FFF.
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so C is correct answer
HSRP (Hot Standby Router Protocol) has two versions: v1 and v2. HSRP v1 uses the virtual MAC address of 0000.0c07.acxx where xx the HSRP group number. HSRP 2 uses the virtual MAC address of 0000.0c9f.fxxx where xxx is the HSRP group number.