A client creates a packet to send to a server. The client is requesting SMTP service. What number will be used as the destination port number in the sending packet?
- 25
- 443
- 161
- 110
| Explanation & Hint:
SMTP, or Simple Mail Transfer Protocol, typically uses port 25. This protocol is used for sending emails from a client to a server or between servers. So, when a client creates a packet to send to a server requesting SMTP service, the destination port number used in the sending packet will be 25. |