Which statement best describes the function of Hot Standby Router Protocol (HSRP)?

A. HSRP specifies a single IP address that all routers in the group must use.

B. HSRP defines a set of routers that represent one virtual, fault-tolerant router.

C. HSRP provides a round-robin gateway selection process to increase fault tolerance.
D. HSRP defines a frame-tagging scheme that allows end stations to use any router as a gateway.

Explanation:

Hot Standby Router Protocol (HSRP) is specified by RFC 2281. The primary function of HSRP is to define a set of routers that work together to represent one virtual, fault-tolerant router. Thus, redundancy is provided in the event that any one of the routers fails. HSRP can be configured on the following interface types:
● Routed ports
● Switched virtual interfaces (SVI)
● Etherchannel port channels

HSRP does use a single IP address to represent a group of routers, but this does not fully describe the function of HSRP.

HSRP does not provide round-robin gateway selection. HSRP uses router priority to select a primary and standby router.

HSRP does not define a frame-tagging scheme that allows end stations to use any router as a gateway. End stations use the virtual IP address of a group of HSRP routers as the default gateway.

Objective:
Infrastructure Services
Sub-Objective:
Configure and verify first-hop redundancy protocols

References:
Internetworking Case Studies > Using HSRP for Fault-Tolerant IP Routing
Cisco > Cisco IOS IP Application Services Configuration Guide, Release 12.4 > Part 1: First Hop Redundancy Protocols > Configuring HSRP