Port number. A port number is a 16-bit unsigned integer, thus ranging from 0 to 65535. For TCP, port number 0 is reserved and cannot be used, while for UDP, the source port is optional and a value of zero means no port.A process associates its input or output channels via an internet socket, which is a type of file descriptor, associated with a transport protocol, an IP address, …

Port-Gentil (French pronunciation: [pɔʁ ʒɑ̃ti]) or Mandji is the second-largest city of Gabon, and its leading seaport.It is the center of Gabon's petroleum and timber industries. The city is located on a delta island in the Ogooue delta with no bridges to the mainland. Nearby Cape Lopez is Gabon's westernmost point. It had a 2013 census population of 136,462.