Implementing Cisco IP Switched Networks (CCNP SWITCH, legacy) — Question 105

Which statement about HSRP, GLBP, and VRRP is true?

Answer options

• A. VRRP group members communicate using multicast address 224.0.0.102.
• B. MAC address 0000.0c07.acOc indicates that default gateway redundancy is provided through GLBP.
• C. HSRP group members communicate using multicast address 224.0.0.18.
• D. GLBP uses UDP port 3222 (source and destination) for hello messages.

Correct answer: D

Explanation

The correct answer is D because GLBP indeed uses UDP port 3222 for its hello messages. Option A is incorrect as VRRP uses a different multicast address, option B is wrong since the MAC address 0000.0c07.acOc is not specific to GLBP, and option C incorrectly states the multicast address used by HSRP.