Well known ports

Question 1

20,21

Answer 1

FTP - Used for sending files between devices

Question 2

22

Answer 2

SSH(Secure Shell) - Used for remote management of computes

Question 3

80

Answer 3

HTTP- Receives text files and renders them as webpages in browser

Question 4

443

Answer 4

HTTPS- HTTP+ encrypts information being transmitted

Question 5

110,995

Answer 5

POP3-Used for retrieving email messages from a mail server

Question 6

25, 587,465

Answer 6

SMTP - Used for sending emails between client and server