Wednesday, May 2, 2012

Well Known Port Numbers doc free ebook download from

The port numbers are divided into three ranges: the Well Known Ports,
the Registered Ports, and the Dynamic and/or Private Ports.

The Well Known Ports are those from 0 through 1023.
Also known as System Ports are assigned by IETF
process for standards-track protocols

The Registered Ports are those from 1024 through 49151
Also known as User Ports are assigned by IANA using the "Expert Review" process,

The Dynamic and/or Private Ports are those from 49152 through 65535
  Dynamic Ports are not assigned.