Description

These are the protocols used on the Internet and on most local Ethernets. It is highly recommended that you say yes here, since some programs (e.g. the X Window System) use TCP/IP even if your machine is not connected to any other computer. They use the so-called loopback device , which this option sets up. It will enlarge your kernel by about 144 KB.

For an excellent introduction to Linux networking, please read the Linux Networking HOWTO, available from https://www.tldp.org/docs.html#howto.