December 2018
Beginner
320 pages
8h 57m
English
Content preview from CentOS Quick Start Guide
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Netmask
Netmask is used to identify a subnet. Binary AND operations of the 32-bit Host IP address with 32-bit netmask yields the network part of the address. The lowest possible address on a subnet is all zeros in the host part; it represents the network address. The highest possible address on a subnet is all ones in the host part; it represents the broadcast address for all hosts on a subnet. It is expressed in two forms. The conventional syntax uses a decimal representation of the network part while the new syntax uses CIDR notation to represent the network prefix (number of ones in the network address). For example, we can represent a 24-bit netmask in both these forms as shown below:
- Conventional form: 255.255.255.0
- CIDR notation: ...
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