What is the range of the well-known ports used by TCP and UDP?
A) 1024-65,536
B) 0-1023
C) 0-65,536
D) 20, 21, 25, 53, 80

Question

Quizplus · Accepted Answer

The well-known ports are the range of port numbers used by the most common protocols associated with TCP and UDP, such as HTTP (port 80), FTP (port 21), and DNS (port 53). The range of these ports is between 0 and 1023. Ports 1024 and higher are considered to be registered and dynamic ports, which are assigned by operating systems and applications as needed. Therefore, option B is the correct answer.

What Is the Range of the Well-Known Ports Used by TCP