Which ports are the “Register ports”, registered by the IANA?

A.
Ports 128 to 255

B.
Ports 1024 to 49151

C.
Ports 1023 to 65535

D.
Ports 1024 to 32767

Explanation:
* the System Ports, also known as the Well Known Ports, from 0-1023 (assigned by IANA)
* the User Ports, also known as the Registered Ports, from 1024- 49151 (assigned by IANA)
* the Dynamic Ports, also known as the Private or Ephemeral Ports, from 49152-65535 (never
assigned)
Reference: http://tools.ietf.org/html/draft-ietf-tsvwg-iana-ports-10