J. Postel IEN 94 ISI 2 May 1979 Internet Protocol Handbook Table of Contents Gateway Level Internet Datagram Protocol IEN-80 Gateway Routing: An Implementation Specification IEN-30 Host Level User Datagram Protocol IEN-88 Transmission Control Protocol IEN-81 Multiplexing Protocol IEN-90 Application Level Name Server Protocol IEN-89 Internet Message Protocol IEN-85 Appendices Protocol Options IEN-92 Address Mappings IEN-91 Assigned Numbers IEN-93 Postel [Page 1]