Port numbers Local and remote hosts are defined using Ip addresses Processes are defined by so called port number The port number in TCP/P are integers between 0 to 65.535 Client process randomly selects a port number by the udp-ephemeral port number TCP/IP uses universal port numbers for servers -well-known port numbers CSIE NTUT TANANCSIE, NTUT, TAIWAN 8 Port Numbers • Local and remote hosts are defined using IP addresses • Processes are defined by so called port number • The port number in TCP/IP are integers between 0 to 65,535 • Client process randomly selects a port number by the UDP – ephemeral port number • TCP/IP uses universal port numbers for servers – well-known port numbers