An ISP which is being termed as Internet access provider, or else IAP) are a company that presents its consumers access to the Internet. The ISP hook up to its users using a data transmission technology suitable for sending Internet Protocol datagrams, for example dial-up, DSL, cable modem, wireless or else devoted high-speed interconnects.

ISPs might also offer Internet e-mail accounts to customers who enable them to correspond with a different by sending as well as receiving electronic messages throughout their ISP's servers. (As part of their e-mail service, ISPs generally present the consumer an e-mail client software package, being created also internally or else through an outside contract arrangement.) ISPs can also offer additional services for example remotely storing data files on behalf of their clients, with other services exclusive to every particular ISP.