What protocol defines a group of routers with one active and one standby router?

What protocol defines a group of routers with one active and one standby router?

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

Answer: (A)

The correct answer is HSRP, which stands for Hot Standby Router Protocol. HSRP is a Cisco proprietary protocol designed to provide redundancy for IP addresses, which allows for a virtual default gateway to clients. In a network utilizing HSRP, routers are organized into a group where one router is designated as the active router, responsible for forwarding traffic, while another router serves as the standby router, ready to take over in the event of a failure of the active router. This setup enhances network availability and reliability by ensuring that there is always a functioning router ready to route packets, thereby preventing network downtime. HSRP uses a virtual IP address that routers in the group share, so when the active router fails, the standby router can immediately assume the role of active router without requiring manual reconfiguration, facilitating seamless failover for end devices. Using HSRP helps maintain continuous service in a network by providing a streamlined way for routers to communicate their roles and maintain redundancy, thereby improving overall network resilience.

The correct answer is HSRP, which stands for Hot Standby Router Protocol. HSRP is a Cisco proprietary protocol designed to provide redundancy for IP addresses, which allows for a virtual default gateway to clients. In a network utilizing HSRP, routers are organized into a group where one router is designated as the active router, responsible for forwarding traffic, while another router serves as the standby router, ready to take over in the event of a failure of the active router. This setup enhances network availability and reliability by ensuring that there is always a functioning router ready to route packets, thereby preventing network downtime.

HSRP uses a virtual IP address that routers in the group share, so when the active router fails, the standby router can immediately assume the role of active router without requiring manual reconfiguration, facilitating seamless failover for end devices.

Using HSRP helps maintain continuous service in a network by providing a streamlined way for routers to communicate their roles and maintain redundancy, thereby improving overall network resilience.