ARP (Address Resolution Protocol) is a protocol used to find an address from the link layer (Ethernet, for example) from the network layer address (such as an IP address).

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What are the purposes of the addresses in this ARP table?

I've seen this on my Windows 7 computer, and searches have turned up others in Vista/7 who have seen the same. However, I've not yet found (or perhaps have just missed) a good explanation for this. ...
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Given a PC's MAC address, can I find its IP?

Is there a way to get the IP address when all you have is the MAC of an item?
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Windows XP Home issuing about 20 ARP requests a second

I have been asked to remotely fix a family member's computer that is running "slow". I've had them run any number of S&D and AVG scans, even in safe mode, but they find nothing of interest. In ...
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Windows 7: The ARP entry addition failed: Access is denied

I'm on Windows 7 and am trying to assign a static arp entry for my default gateway using the command: arp -s 172.24.7.254 00-05-01-f9-28-00 172.24.1.20 But I get the following error: The ARP ...
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Inverse ARP lookup

How can I do an inverse ARP lookup in Windows and/or Linux? Say that I have the MAC address of wireless access point which is up and running in the network, but I forgot it's IP address?