Which protocol uses the well-known TCP port 110?
- POP
- IMAP
- SMTP
- DNS
| Explanation & Hint:
The protocol that uses the well-known TCP port 110 is POP (Post Office Protocol), specifically POP3 which is the most recent version. POP3 is used for retrieving emails from a server and is one of the two most common email retrieval protocols, the other being IMAP. |