Generally, a domain corresponds to an IP address or an area on a host. There are many Internet sites that have established publicly accessible repositories of material that can be obtained using FTP, by logging in using the account name anonymous, thus these sites are called anonymous ftp servers. Host Any computer on a network that is a repository for services available to other computers on the network. A computer that is attached to a network or the Internet. Hosts allow users on client machines to connect and share files or transfer information.
Individual users communicate with hosts by using client application programs.
The 32-bit address defined by the Internet Protocol. Every resource on the Internet has a unique numerical IP address, represented in dotted decimal notation. IP addresses are the closest thing the Internet has to phone numbers. Sometimes called a dotted quad. A unique number consisting of 4 parts separated by dots, e.g.165.113.245.2 Every machine that is on the Internet has a unique IP number - if a machine does not have an IP number, it is not really on the Internet.