200-150 · Question #207
Which statement about the HSRP protocol is true?
The correct answer is C. HSRP version 2 is an open standard protocol that is described in RFC 2281. HSRP is a Cisco gateway redundancy protocol formally documented in RFC 2281, with a single active router per group and no default preemption in NX-OS.
Question
Which statement about the HSRP protocol is true?
Options
- AMultiple routers in an HSRP group are in an active state, to enable round-robin load balancing of
- BIn Cisco NX-OS. HSRP is configured to pre-empt by default
- CHSRP version 2 is an open standard protocol that is described in RFC 2281
- DOne router in an HSRP group is in an active state. All other routers are in a standby state or
How the community answered
(26 responses)- A4% (1)
- B4% (1)
- C92% (24)
Why each option
HSRP is a Cisco gateway redundancy protocol formally documented in RFC 2281, with a single active router per group and no default preemption in NX-OS.
HSRP does not support multiple simultaneous active routers or round-robin load balancing; only one router per group is active at any given time.
In Cisco NX-OS, HSRP preemption is disabled by default and must be explicitly enabled with the 'preempt' command under the HSRP group configuration.
RFC 2281 is an informational RFC that publicly documents the Hot Standby Router Protocol, providing a formal technical specification for the protocol's operation and message formats. This RFC reference is what distinguishes HSRP from a purely internal proprietary protocol, as its behavior is publicly described in the IETF document series. The other options contain factual errors about HSRP behavior that make them incorrect.
In an HSRP group only one router is in the standby state; remaining routers beyond the active and standby are placed in the listen state, not the standby state.
Concept tested: HSRP protocol behavior and RFC documentation
Source: https://www.rfc-editor.org/rfc/rfc2281
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