Cisco CCNA First Hop Redundancy Protocols (HSRP, VRRP, GLBP)

Question 1

Which first hop redundancy protocol is Cisco-proprietary and uses an active/standby model with one virtual IP address?

Accepted Answer

HSRP

Answer

HSRP (Hot Standby Router Protocol) is Cisco-proprietary. One router is elected active and forwards traffic sent to the virtual IP, while a standby router takes over if the active router fails. VRRP is an open standard, GLBP adds load balancing, and CARP is not a Cisco protocol.

Question 2

When HSRP is deployed, what should end hosts be configured to use as their default gateway?

Accepted Answer

The HSRP virtual IP address

Answer

Hosts point to the virtual IP that the HSRP group shares. Whichever router is active answers for that virtual IP and its virtual MAC, so failover is transparent to hosts and no reconfiguration is needed.

Question 3

What is the default HSRP priority on a Cisco router?

Accepted Answer

100

Answer

The default HSRP priority is 100. The router with the highest priority becomes active. If priorities tie, the router with the highest interface IP address wins.

Question 4

What does the 'standby 1 preempt' command do?

Accepted Answer

It lets a router with a higher priority take over the active role from a lower-priority active router

Answer

Without preemption, a higher-priority router that comes online after election does not take over from the current active router. With preempt configured, it takes the active role as soon as its priority is higher.

Question 5

Which first hop redundancy protocol is an IEEE/IETF open standard (RFC 5798) and can run on multi-vendor equipment?

Accepted Answer

VRRP

Answer

VRRP (Virtual Router Redundancy Protocol) is an open standard defined in RFC 5798, so it works between vendors. HSRP and GLBP are Cisco-proprietary.

Cisco CCNA Practice Test

Cisco CCNA Practice Test

Cisco CCNA First Hop Redundancy Protocols (HSRP, VRRP, GLBP)