arpanet address resolution protocol application layer bbn technologies border gateway protocol cyclades communications protocol darpa datagram congestion control protocol domain name system dynamic host configuration protocol echo protocol embedded system endpoint handlespace redundancy protocol ethernet explicit congestion notification extensible messaging and presence protocol file transfer protocol gprs tunnelling protocol hubert zimmerman hypertext transfer protocol ip over avian carriers ipsec is-is ian mclean internet internet architecture board internet control message protocol internet engineering task force internet group management protocol internet layer internet message access protocol internet protocol internet relay chat internetwork protocol internetworking link layer linux list of tcp and udp port numbers louis pouzin lower layer protocol mac os x media access control microsoft windows neighbor discovery protocol network control program network news transfer protocol network time protocol osi model open shortest path first open source parc universal packet packet radio peer name resolution protocol personal computer post office protocol presidential medal of freedom real-time transport protocol real time streaming protocol reliable user datagram protocol remote procedure call resource reservation protocol reverse address resolution protocol rlogin router routing information protocol secure shell session description protocol session initiation protocol simple mail transfer protocol simple network management protocol simple traversal of udp over nats stanford university stream control transmission protocol time protocol telnet tim berners-lee transmission control protocol transport layer trivial file transfer protocol tunneling protocol university college london unix unix-like upper layer protocol user datagram protocol world wide web