Application protocol standards. The Internet standards cover many common applications, such as electronic mail, file transfer, and remote login. The local host for a particular user is the computer at which that user is working. A foreign host is any other host name on the network. From the point of view of the communications network, hosts are both the source and destination of packets.
Any host can be a client, a server, or both.
On an Internet network, a host is identified by its Internet name and address. The combination of two or more hosts and the connecting links between them. A physical network is the hardware that makes up the network. A logical network is the abstract organization overlaid on all or part of one or more physical networks. The Internet network is an example of a logical network.