The only real limitation is the scope of the network. Accessing computers that are not on the high-speed network still requires a modem or some other communication method. With the introduction of the Internet came a new and extensive network system, packed with features. Communications and file transfers are simpler and easier than ever before. The Internet indirectly connects any computer on the Internet to every other computer on the Internet.
Access is immediately possible to growing millions of computers and files.
The administrator of each computer on the Internet grants permission to access their computer. The server is a computer that responds to requests for its services. The client is a computer that requests a service from a server. When the guest asks for something, the host tries to fill the request. Internet servers need to be powerhouse computers, handling high volumes and concurrent requests.