About
Common groups of information and parameters concerning the kernel are are set with the help of configuration files and grouped into directories and subdirectories within the /proc/ directory.
/proc/sys/net/ is one of this directories and directory contains subdirectories concerning various networking topics.
Various configurations at the time of kernel compilation make different directories available here, such as appletalk, ethernet, ipv4, ipx, and ipv6. Within these directories, system administrators are able to adjust the network configuration on a running system.