Network Protocols Quiz

Which port number is used by FTP for sending files?

• tcp/21

• tcp/20

• udp/21

• udp/20

Which port number is used by FTP for control commands (e.g., authentication)?

• tcp/21

• tcp/20

• udp/21

• udp/20

Which port number does SSH use for encrypted console access?

• tcp/21

• tcp/22

• tcp/23

• tcp/25

Which port number is used by Telnet for insecure console access?

• tcp/23

• tcp/22

• tcp/80

• tcp/21

Which port number is used by SMTP to transfer email between mail servers?

• tcp/25

• tcp/21

• tcp/110

• tcp/443

Which port number is used by DNS for both querying and zone transfers?

• udp/53

• tcp/53

• tcp/80

• udp/80

Which port numbers are used by DHCP for communication?

• udp/67, udp/68

• tcp/80, tcp/443

• udp/53, udp/67

• tcp/25, udp/25

Which port number is used by HTTP for web server communication?

• tcp/80

• tcp/21

• tcp/443

• udp/80

Which port number is used by HTTPS for secure web server communication?

• tcp/443

• tcp/80

Which port number is used by POP3 to receive email into an email client?

• tcp/110

• tcp/143

• tcp/25

• tcp/80