When a workstation tries to communicate with a server (ex. www.cnn.com), which of these is a possible port number of the sender ?
A) 80
B) 21
C) 58
D) 110
E) 65000

Question

Quizplus · Accepted Answer

When a workstation communicates with a server, the server uses well-known port numbers for specific services (e.g., port 80 for HTTP). The workstation, however, uses ephemeral ports for the source port in the communication, which can range from 1024 to 65535. Port 65000 falls within this ephemeral port range, making it a possible port number for the sender. Ports like 80 (HTTP), 21 (FTP), and 110 (POP3) are typically used by servers to listen for incoming connections, not by clients as source ports.

When a Workstation Tries to Communicate with a Server (Ex