Which of the following holds good in terms of Network Port

(A). A network port is a number used by Transport Layer protocols (such as TCP and UDP) 

(B). The Internet Assigned Numbers Authority (IANA) manages the assignment and use of these ports.

(C). Registered Ports (1024 to 49151): These ports are assigned by IANA for specific services based on requests.

(D). Port 23: Secure Shell (SSH) – Enables a secure remote connection to systems for administration and file transfer.