Clearing ARP Cache
Most people have never heard of ARP. It is something that is very important and something you need to understand since it is essential to your network communication.
You need to understand that ARP is very important when talking about IP networking. ARP connects OSI Layer 3, which is the network to OSI Layer 2, which is that data link. In plain language this means that the ARP is what we use to link our IP address to our Ethernet address. Before you can communicate with other devices on your network you must first have an Ethernet MAC address that is used for that device. If by chance your device is not on your LAN you will then have to go through your router, or default gateway to link to the device. Under this circumstance your router will be your destination device and will allow your PC to communicate with it.
Now that we understand what ARP is we can look at the two types of ARP. Those types are static and dynamic. The average person will usually use dynamic for most computer sessions. This means you are linked to the Ethernet for as long as you are using your PC. The opposite of this is static which means you are manually putting in the link between the IP address and the Ethernet.
If a PC needs to communicate with another host it must first be able to read the host name with the DNS server. The IP address must be resolved and read before the PC will be able to communicate with the host you are trying to access. Once this communication is accomplished this entry will then stay in a local ARP cache to be ready for the next time you need to use it. The ARP will then stay in the cache until you remove it or until the time has expired. You can be assured that if the router is communicating with the device you will have an ARP cache.
Regardless of the IP device that you use you will have an ARP cache. This comes in handy with your trouble shooting should you start to have problems. If for some reason you start to have problems you may want to clear your ARP cache and try to reestablish your communication again.
Sometimes when you attempt to clear your ARP cache you will find that you are unable to do so because of a bug in Microsoft Windows. Microsoft has had its share of problems when it comes to errors and trouble shooting. You may receive an error message that tells you Windows could not finish repairing the problem.
The usually happens when routing and remote services is turned on. For the most part routing and remote services is not necessary and can remain turned off. To do this you should click the start button then click Control Panel. If you are in Category View you should switch to Classic View. Then click on Administrative Tools, Computer Management, Services and Applications, Services, and then scroll down to routing and remote services. Here you should be able to turn off this feature and clear your ARP cache without any problems.
Click Here For A Free PC Scan.
Tags: PC Tips
