ISP stands for Internet services providers. It a company that provides the internet services connection. Internet Services Providers (ISP) also provide the facility of email. A connection from Internet Services providers (ISP) is necessary to connect the internet. The Internet Services providers according to the type of internet bandwidth and services.
The Internet Services Providers (ISP) establish a backbone link to other Internet Services Providers (ISP) all over the world on high-speed communication links, like fiber optics ( included Submarine) and satellite. A computer connected to any Internet Services providers in the world becomes part of the internet.
There are many public and private Internet Services Providers (ISP) in Pakistan like PTCL, WI-TRIBE, Niall, and mobile companies Like JAZZ, Zong, etc.