Thus, each address is composed of an Internet address specifying the host and net- work, with a specific TCP port on the host identifying the peer entity.
Active sockets initiate connections to passive sockets.
Once a connection has been established the sock- et's address is fixed by the peer entity's location. The address as- signed the socket is the address associated with the network interface through which packets are being transmitted and received. Normally this address corresponds to the peer entity's network. For a small number of clients, such as window systems that send a stream of mouse events which receive no replies, this packetization may cause significant delays.