Learn how Cisco’s Hot Standby Router Protocol (HSRP) ensures fast, seamless traffic recovery during edge device or access circuit failures. Discover the benefits of HSRP over other redundancy protocols.
Table of Contents
Question
Which Cisco proprietary protocol ensures traffic recovers immediately, transparently, and automatically when edge devices or access circuits fail?
A. FHRP
B. VRRP
C. HSRP
D. SLB
Answer
C. HSRP (Hot Standby Router Protocol)
Explanation
HSRP is a Cisco proprietary protocol that provides immediate, transparent, and automatic traffic recovery when edge devices or access circuits fail. It allows multiple routers to act as a single virtual router, with one active router and one or more standby routers. The active router forwards packets while the standby routers monitor its status. If the active router fails, a standby router takes over its role instantly, ensuring minimal traffic disruption.
HSRP offers several advantages:
- Fast failover: HSRP detects failures quickly and switches to the standby router within seconds.
- Transparency: End devices are unaware of the failover process, as they continue to use the same virtual IP and MAC addresses.
- Load sharing: HSRP can be configured to balance traffic across multiple routers, improving performance and resource utilization.
- Flexibility: HSRP supports IPv4 and IPv6 and can be used in various network topologies.
The other options are not Cisco proprietary or do not provide the same level of immediate, transparent, and automatic traffic recovery:
- FHRP (First Hop Redundancy Protocol) is a generic term for protocols like HSRP, VRRP, and GLBP, not a specific protocol.
- VRRP (Virtual Router Redundancy Protocol) is an open standard similar to HSRP but not Cisco proprietary.
- SLB (Server Load Balancing) distributes traffic across servers but does not provide router redundancy.
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