network cisco ccna gns3 certification arteq

network cisco ccna gns3 certification arteq
a network runs through it

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Sunday, December 4, 2011

ARP, ARP, baby...

ARP- address resolution protocol

according to wikipedia :

Address Resolution Protocol (ARP) is a telecommunications protocol used for resolution of network layer addresses into link layer addresses, a critical function in multiple-access networks. ARP was defined by RFC 826

and there you have it...

a host wants to send an unknown host a mess,
DNS supplies the host  unkown's IP address
layer 2 has no clue
it ARP's for the cue
so IP is assigned a hardware address


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