What protocol or technology allows a standby router to assume packet-forwarding responsibility if the active router fails?

What protocol or technology allows a standby router to assume packet-forwarding responsibility if the active router fails?

• A. HSRP
• B. VRRP
• C. GLBP
• D. PVRST+

Answer: (A)

The correct choice is HSRP, which stands for Hot Standby Router Protocol. HSRP is a Cisco proprietary redundancy protocol that provides high availability for IP networks by enabling a group of routers to work together to present the appearance of a single virtual router to the hosts on the network. In an HSRP configuration, one router is designated as the active router, responsible for forwarding packets. A standby router is also defined, and it monitors the active router's health. If the active router fails, the standby router automatically takes over the IP address of the virtual router, allowing it to begin forwarding traffic immediately without significant disruption to network operations. This failover process ensures that there is minimal downtime and helps maintain network reliability. While the other protocols mentioned also provide redundancy, they operate in slightly different ways. VRRP (Virtual Router Redundancy Protocol) is a standard for achieving high availability and operates similarly to HSRP but is not Cisco-specific. GLBP (Gateway Load Balancing Protocol) not only provides redundancy but also allows for load balancing between multiple routers. PVRST+ (Per VLAN Rapid Spanning Tree Plus) is focused on maintaining a loop-free topology in a network rather than router failover. Therefore, HSRP

The correct choice is HSRP, which stands for Hot Standby Router Protocol. HSRP is a Cisco proprietary redundancy protocol that provides high availability for IP networks by enabling a group of routers to work together to present the appearance of a single virtual router to the hosts on the network.

In an HSRP configuration, one router is designated as the active router, responsible for forwarding packets. A standby router is also defined, and it monitors the active router's health. If the active router fails, the standby router automatically takes over the IP address of the virtual router, allowing it to begin forwarding traffic immediately without significant disruption to network operations. This failover process ensures that there is minimal downtime and helps maintain network reliability.

While the other protocols mentioned also provide redundancy, they operate in slightly different ways. VRRP (Virtual Router Redundancy Protocol) is a standard for achieving high availability and operates similarly to HSRP but is not Cisco-specific. GLBP (Gateway Load Balancing Protocol) not only provides redundancy but also allows for load balancing between multiple routers. PVRST+ (Per VLAN Rapid Spanning Tree Plus) is focused on maintaining a loop-free topology in a network rather than router failover. Therefore, HSRP