Address Resolution Protocol
Jason shows how the address resolution protocol (arp) works on a local area network, and where gratuitous arps are useful in a redundant infrastructure.
arp protocol
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Alice AUSTIN
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8 thoughts on “Address Resolution Protocol”
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and how does this play out in the public network ?
any way to replicate it ?
Go Cardinals!
Hi, Great video. Id like to ask, @4:10, shouldn't the client to check that destinatons IP is not on its LAN, and then request MAC ( via ARP ) of its default ateway IP, assuming mac is not cached in clients arp table already? why does it arp for 8.9.10.11 instead? And why would router reply to this arp? Are you talking about ARP Proxy ?
Wow
It would be nice to have a link to more information about concepts mentioned, such as:
[5:46] HSRP = https://en.wikipedia.org/wiki/Hot_Standby_Router_Protocol
VRRP = https://en.wikipedia.org/wiki/Virtual_Router_Redundancy_Protocol
Nice
Hi, the second part of this talk is not correct, as hosts critically only perform ARP requests for IP addresses within subnets to which the host is directly connected. In this example, S1 would perform a DNS lookup for espn.com, see that its IP is not on a connected subnet and then attempt send the packet to the host's default gateway, performing an ARP request for its default gateway IP should it not already have the gateway's MAC in its ARP table.
Hi, I got silly question. How do we know what mac address to use for the masquerade ? Is it virtually anything? Or is there some kind of guide out there that I can use to implement it.