TheInternetis a global system of interconnectedcomputer networksthat use the standardInternet protocol suite(TCP/IP) to link several billion devices worldwide. It is anetwork of networksthat consists of millions of private, public, academic, business, and government networks, of local to global scope, that are linked by a broad array of electronic, wireless, and optical networking technologies. The Internet carries an extensive range of information resources and services, such as the inter-linkedhypertextdocuments andapplicationsof theWorld Wide Web(WWW), theinfrastructureto support email, andpeer-to-peernetworks forfile sharingandtelephony.