The Address Resolution Protocol is designed to ease communication in TCP/IP networks through accelerated methods of finding host hardware addresses when the network layer is known. When a network layer has been resolved to a data link layer address, the link between the two is put in a table called an ARP cache where matched sets of Hardware and Internet Protocol are kept.
The ARP Cache therefore hastens what could otherwise be a time-wasteful process. The ARP cache may however, encounter some problems. The cache table must be maintained in an orderly manner.
There is also the possibility that the cache entries might become stale with time, and more cache entries might be added without the expired ones being removed from the cache. The initial signs that the cache needs to be cleared is when the pages just won’t load and also when you might be unable to ping certain IP addresses. It is suggested that before doing anything, you might try and first check whether the routing and remote services have been disabled (no need to do that if you are using Windows XP Home Edition).
To clear the ARP cache in Windows 2000/2003/XP and Vista, take the following...
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