CCNA: Cisco Certified Network Associate — Question 702

When deploying a new network that includes both Cisco and third-party network devices, which redundancy protocol avoids the interruption of network traffic if the default gateway router fails?

Answer options

• A. VRRP
• B. FHRP
• C. GLBP
• D. HSRP

Correct answer: A

Explanation

The correct answer is VRRP (Virtual Router Redundancy Protocol), which allows multiple routers to work together to present the illusion of a single virtual router to clients, ensuring continuous network availability. FHRP (First Hop Redundancy Protocol) is a general term that includes protocols like HSRP and VRRP but does not specify a solution itself. GLBP (Gateway Load Balancing Protocol) provides load balancing but is not focused on failover alone like VRRP. HSRP (Hot Standby Router Protocol) is Cisco-specific and does not support non-Cisco devices, making VRRP a better choice for mixed environments.