ICTP - URSI SCHOOL ON DIGITAL AND MULTIMEDIA COMMUNICATIONS USING TERRESTRIAL AND SATELLITE RADIO LINKS 12th February - 2nd March 2001 , Trieste (Italy)     -             COMPUTER NETWORKING BASICS (part 1)   presented by Carlo Fonda, The Abdus Salam International Centre for Theoretical Physics (ICTP) Programme of Training and System Development on Networking and Radiocommunications