Concepts / Addressing

Addressing

IP address

Also called IPv4 address, address

A device's address across networks: 32 bits, written as four numbers like 10.0.1.10.

An address is always paired with a prefix length (/24) that says which part names the network and which the device. Routers forward by the network part. A device can have several addresses, one per network it is on; ip -br addr lists them.

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