Intro to the Internet, IP Addresses and DNS

• TCP/IP co-developers

  Vint Cerf and Bob Kahn
• The first TCP/IP network was called ARPANET.
• TCP/IP stands for Transmission Control Protocol/Internet Protocol
• Internet Engineering Task Force (IETF)

  A volunteer organization who develops and promotes voluntary internet standards
• "Nobody and everybody is in charge of making the internet work" means that everyone uses the same protocols
• World Wide Web (WWW) is a system of interlinked web pages that can be accessed through the Internet.
• A web browser is a software application for retrieving, presenting, and traversing information resources on the World Wide Web.
• IPv4 is the version of the Internet Protocol that routes majority of Internet traffic today
• An IPv4 IP address contains four 8-bit(1 byte) numbers separated by periods
• IPv4 is able to represent approximately 4.2 billion IP addresses
• Network Address Translation (NAT) is a method of translating private IP addresses into public IP addresses
• Internet will transition to IPv6 which uses eight 16-bit IP addresses
• Domain Name System (DNS) is a hierarchical naming system that maps human-readable domain names to IP addresses.
• domain name, or the root of a web address is an identification string that defines a realm of administrative autonomy, authority, or control within the internet; is registered with DNS