I don't know exactly what socket means. A server runs on a specific computer and has a socket that is bound to a specific port number. The server just waits, listening to the socket for a client to...
In the realm of a network socket, a socket object is a communication tunnel dependent on a host IP address and port number to communicate at.
A socket is a pseudo-file that represents a network connection. Once a socket has been created (identifying the other host and port), writes to that socket are turned into network packets that get sent out, and data received from the network can be read from the socket. Sockets are similar to pipes. Both look like files to the programs using them. Both facilitate interprocess communication ...
networking - What is a socket? - Unix & Linux Stack Exchange
AF_INET is an a ddress f amily that is used to designate the type of addresses that your socket can communicate with (in this case, Internet Protocol v4 addresses). When you create a socket, you have to specify its address family, and then you can only use addresses of that type with the socket. The Linux kernel, for example, supports 29 other address families such as UNIX (AF_UNIX) sockets ...
A socket, in C parlance, is a data structure in kernel space, corresponding to one end-point of a UDP or TCP session (I am using session very loosely when talking about UDP). It's normally associated with one single port number on the local side and seldom more than one "well-known" number on either side of the session. A "raw socket" is an end-point on, more or less, the physical transport ...