Well+Known+Ports

The port numbers in the range from 0 to 1023 are the **//well-known ports//**. They are used by system processes that provide widely-used types of network services. On Unix-like operating systems, a process must execute with superuser privileges to be able to bind a network socket to an IP address using one of the well-known ports. The first 10 Well Known Ports:
 * 1 || TCP || UDP || TCP Port Service Multiplexer (TCPMUX) || Official ||
 * 2 || TCP || UDP || CompressNET Management Utility || Official ||
 * 3 || TCP || UDP || CompressNET Compression Process || Official ||
 * 4 || TCP || UDP || Unassigned || Official ||
 * 5 || TCP || UDP || Remote Job Entry || Official ||
 * 7 || TCP || UDP || Echo Protocol || Official ||
 * 8 || TCP || UDP || Unassigned || Official ||
 * 9 || TCP || UDP || Discard Protocol || Official ||
 * 10 || TCP || UDP || Unassigned || Official ||