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Glossary: Networking Basics

subnet mask

Also written: mask, netmask, 255.255.255.0

The network part of an address written as 32 bits: a 1 for each network bit and a 0 for each host bit, so a /26 becomes 255.255.255.192. Windows shows masks, and Linux shows prefixes.

Where the book teaches it

Related terms

prefix lengthANDCIDR notation