An Internet service provider (ISP) is an organization that provides access to the Internet. Access ISPs directly connect clients to the Internet using copper wires, wireless or fiber-optic connections.^[1]

Hosting ISPs are a kind of colocation centre that leases server space to smaller businesses and other people. Transit ISPs provide large amounts of bandwidth for connecting hosting ISPs to access ISPs.^[2]

Internet service providers can be either community-owned and non-profit, or privately owned and for-profit.