22b. TCP & IP - Well known protocols

What is the primary function of a port in TCP/IP protocol?

• To encrypt data packets

• To increase internet speed

• To determine which application should deal with a packet

• To store data temporarily

Which port is typically used by FTP for sending and receiving data by default?

• 8080

• 110

• 80

• 20

What protocol typically uses port 80 or 8080?

• SMTP

• FTP

• HTTP

• POP3

What is the purpose of a firewall in the context of network ports?

• To increase data transfer speed

• To serve web pages

• To block or allow specific types of traffic

• To store data

Which protocol is used for retrieving mail from a mail server and typically enters a computer on port 110?

• IMAP

• HTTP

• POP3

• SMTP