350-401 · Question #691
By default, which virtual MAC address Goes HSRP group 25 use?
The correct answer is C. 00:00:0c:07:ac:19. The default virtual MAC address for HSRP (Hot Standby Router Protocol) uses a specific format, where the last octet is the hexadecimal representation of the HSRP group number.
Question
Exhibit
Options
- A05:5c:5e:ac:0c:25
- B04:16:6S:96:1C:19
- C00:00:0c:07:ac:19
- D00:00:0c:07:ac:25
How the community answered
(38 responses)- A3% (1)
- C95% (36)
- D3% (1)
Why each option
The default virtual MAC address for HSRP (Hot Standby Router Protocol) uses a specific format, where the last octet is the hexadecimal representation of the HSRP group number.
This MAC address `05:5c:5e:ac:0c:25` does not conform to the standard HSRP virtual MAC address format.
This MAC address `04:16:6S:96:1C:19` does not conform to the standard HSRP virtual MAC address format.
The default HSRP virtual MAC address format is `00:00:0c:07:ac:XX`, where `XX` is the hexadecimal equivalent of the HSRP group number. For HSRP group 25 (decimal), its hexadecimal value is 19, resulting in the MAC address `00:00:0c:07:ac:19`.
This MAC address `00:00:0c:07:ac:25` incorrectly uses the decimal value (25) as the last octet instead of its hexadecimal equivalent (19).
Concept tested: HSRP Virtual MAC Address format
Source: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipapp_fhrp/configuration/xe-16/fhrp-xe-16-book/fhrp-hsrp.html
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