which of the following?

Registered ports, registered by the IANA, are designated as which of the following?

A.
Ports 128 to 255

B.
Ports 1024 to 49151

C.
Ports 1025 to 65535

D.
Ports 1024 to 32767

Explanation:
Port numbers are divided into three ranges: the well known ports, the
registered ports, and the dynamic and/or private ports. The registered ports,
registered by the IANA (Internet Assigned Numbers Authority), are ports numbered
1024 to 49151.