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Questions and Answers
What happens if the router that responded to the ARP request fails in Proxy ARP?
What happens if the router that responded to the ARP request fails in Proxy ARP?
What happens after the time-out period on the host in Proxy ARP?
What happens after the time-out period on the host in Proxy ARP?
What is the limitation of Proxy ARP during failover time?
What is the limitation of Proxy ARP during failover time?
What is the purpose of First Hop Redundancy Protocols (FHRPs) according to the text?
What is the purpose of First Hop Redundancy Protocols (FHRPs) according to the text?
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What is the role of redundancy protocols in the context of the text?
What is the role of redundancy protocols in the context of the text?
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Study Notes
Proxy ARP and First Hop Redundancy Protocols
- Proxy ARP allows a host to send traffic as if the destination device were on its own network segment
- If the router that responded to the ARP request fails, the source host continues to send packets to the same MAC address, which are then sent to another router on the network
- After a time-out period, the proxy ARP MAC address ages out of the ARP cache on the host
- The host can then make a new ARP request for the destination and get the address of another proxy ARP router
- During failover time, the host cannot send packets off of its subnet
- This imperfect situation leads to the need for a better solution
- First Hop Redundancy Protocols (FHRPs) are introduced as a solution
- FHRPs provide redundancy for the first hop, ensuring high availability in the network
- Common FHRPs include HSRP (Hot Standby Router Protocol), VRRP (Virtual Router Redundancy Protocol), and GLBP (Gateway Load Balancing Protocol)
- These protocols allow for seamless failover and load balancing in the network
- FHRPs ensure that if one router fails, another can seamlessly take over its role
- FHRPs improve network reliability and resiliency
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Description
Test your knowledge of Proxy ARP with this quiz. Explore how Proxy ARP allows a host to communicate with a device on a different network segment as if it were on the same segment. Understand the behavior of host devices and routers in Proxy ARP scenarios.
