ISP stands for Internet Service Provider. ISP refers to a company that provides internet access and services, including internet transit, web hosting, domain name registration and email services, to name a few. An ISP serves as a gateway to access everything available on the internet, usually for a fee.
There are three levels of ISP.
A Tier 1 ISP sits at the top of the internet access pyramid with access to all networks on the internet.
These ISPs then sell access to Tier 2 ISPs which further sell access directly to organisations and individuals.
ISPs are responsible for maintaining network infrastructure, routing network traffic and enabling users to establish internet connectivity.
