Subnet Masks

Question: What is a subnet mask and what role does it perform on a school network?

The IT Guy says:
A subnet mask is a number assigned to your computer, along with its IP address, which identifies it on your local network. For more about IP addresses in general, refer to "The IT Guy: IP Addresses".

Use of subnet masks allows network administrators to organize computers on a local network into smaller groups. This can functionally isolate some computers from others, preventing users from browsing to network resources located on other parts of the network, depending on how other settings on client and server computers are configured. For more information about subnet masks, refer to Subnetwork on Wikipedia. This online encyclopedia is one of my favorite free online sources of fairly reliable information.

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