1. An Internet address that combines an IP address (the four-part numerical addrss that uniquely identifies a prticular computer on the Internet) and a port number (which identifies a prticular Internet application, such as File Transfer Protocol [FTP], Gopher, or the World Wide Web [WWW]). See well-known port. From QUECID

2. Multi purpose socket tool The socket program is a simple tool for socket based connections. It can be used to create simple daemons (in both standalone and inetd mode), to connect to other daemons or to redirect ports. From Debian 3.0r0 APT