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Proto
The protocol (tcp, udp, raw) used by the socket.

Recv-Q
The count of bytes not copied by the user program connected to this socket.

Send-Q
The count of bytes not acknowledged by the remote host.

Local Address
Address and port number of the local end of the socket.
Unless the --numeric (-n) option is specified, the socket
address is resolved to its canonical host name (FQDN), and
the port number is translated into the corresponding ser-
vice name.

Foreign Address
Address and port number of the remote end of the socket.
Analogous to "Local Address."

State
The state of the socket. Since there are no states in raw
mode and usually no states used in UDP, this column may be
left blank. Normally this can be one of several values:

User
The username or the user id (UID) of the owner of the
socket.

PID/Program name
Slash-separated pair of the process id (PID) and process
name of the process that owns the socket. --program
causes this column to be included. You will also need
superuser privileges to see this information on sockets
you don't own. This identification information is not yet
available for IPX sockets.

Timer
(this needs to be written)

Active UNIX domain Sockets
Proto
The protocol (usually unix) used by the socket.

RefCnt
The reference count (i.e. attached processes via this
socket).