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arp -a ?

Posted on 2006-11-16
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Last Modified: 2010-04-18
What does arp -a do?

It looks like it gives 3 dynamic ip addresses.
None of those addresses match the address I get when I run ipconfig command.

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Question by:kamleshmistry
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by:sirbounty
ID: 17960627
Essentially, it displays the arp cache (address resolution) - showing internet address to physical (MAC) address.
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sirbounty earned 2000 total points
ID: 17960643
More info on arp:

ARP is the Address Resolution Protocol.
The ARP protocol maps addresses between the Data Link Layer and the Network Layer of the OSI Model.
The Data Link layer of TCP/IP networks utilizes MAC addresses; the Network Layer of TCP/IP networks utilizes IP addresses.
ref: http://www.tech-faq.com/arp.shtml

and a lot of Q&A regarding ARP info: http://www.geocities.com/SiliconValley/Vista/8672/network/arp.html
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