Implementing Cisco IP Switched Networks (CCNP SWITCH, legacy) — Question 7

Which protocol will enable a group of routers to form a single virtual router and will use the real IP address of a router as the gateway address?

Answer options

• A. Proxy ARP
• B. HSRP
• C. IRDP
• D. VRRP
• E. GLBP D

Correct answer:

Explanation

The correct answer is HSRP (Hot Standby Router Protocol), which enables a group of routers to present a single virtual IP address as the default gateway. The other options do not provide this specific functionality: Proxy ARP is used for address resolution, IRDP is an outdated protocol, VRRP (Virtual Router Redundancy Protocol) and GLBP (Gateway Load Balancing Protocol) serve similar purposes but with different mechanisms and configurations.