Feng Gang National Laboratory of Communication,UESTC Aug 2017 Ver 1.4 Internet protocols email W phone... SMTP HTTP RTP... TCP UDP. The Internet Protocol Hourglass IP Ethernet PPP CSMA async sonet... copper fiber radio... 2616009:Network Traffic Engineering 1:Overview Page.92616009: Network Traffic Engineering Feng Gang National Laboratory of Communication, UESTC Aug 2017 Ver 1.4 1: Overview Page.9 Internet protocols email WWW phone... SMTP HTTP RTP... TCP UDP… IP Ethernet PPP… CSMA async sonet... copper fiber radio... The Internet Protocol Hourglass