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1 Physical sockets

1.1 Electrical sockets

A CPU socket is a physical and electrical specification of how to connect a CPU to a motherboard.

In electronics, a socket is also used as a synonym for a jack.

An electrical socket is a synonym of electrical outlet: an electrical device connected to a power source onto which another device can be plugged or screwed in. Typical examples are wall sockets and light bulb sockets. See Domestic AC power plugs & sockets.

1.2 Biological sockets

• Eye socket s or orbits are regions in the skull where the eyes are positioned.
• When a tooth is pulled, if the hole becomes painful as a result of the blood not clotting so as to keep it moist until it heals, the opening is referred to as a dry socket.

2 Computer sockets

In the world of computers, there are two types of sockets- Internet sockets, and IPC sockets.

A socket can be used in computer networking to form one end of a bi-directional communication link between two programs, likely over a network, though exceptions like the X Windowing System exist.

Sockets can also be used for IPC, without IP addresses or any other staples of TCP/IP.

2.1 Internet sockets

In RFC documents relating to TCP or UDP, a socket on a certain host is defined as the combination of an IP address, a protocol, and a portIn computing, a port (derived from seaport) is usually an interface through which data is sent and received. An exception is a software port (derived from transport), which is software that has been "transported" to another computer system (see below for number.

The BSDBerkeley Software Distribution BSD is the name of the UNIX derivative distributed in the 1970s from the University of California, Berkeley. The name is also used collectively for the modern descendants of these distributions. History AT&T Bell Laboratorie operating system introduced network sockets in 1983: see the Berkeley sockets APIThe Berkeley sockets application programming interface (API) comprises a library for developing applications written in the C programming language that access a computer network. Berkeley sockets (also known as the BSD socket API) originated with the 4.. Each socket gets bound to a given port, which lets the transport layerIn computing and telecommunications, the transport layer is level four of the seven level OSI model. It responds to service requests from the session layer and issues service requests to the network layer. The transport layer provides transparent transfer protocol (typically UDP or TCP) identify which application to send the data to.

2.2 Unix domain sockets, IPC sockets

Another type of socket is used by POSIX compliant systems, and are called Unix domain sockets (the correct standard POSIX term is POSIX Local IPC Sockets). Their primary function is as a means for inter-process communication and are therefore also called IPC sockets. These connections are from the local computer to itself, not actually a connection transmitted over a physical network.