ICND 1 - Common Ports

Question 2

What port does FTP (File Transfer Protocol) use?

Answer 2

TCP ports 20 and 21

Question 3

What port does SSH (Secure Shell) use?

Answer 3

TCP port 22

Question 4

What port does Telnet use?

Answer 4

TCP port 23

Question 5

What port does SMTP (Simple Mail Transfer Protocol use?

Answer 5

TCP port 25

Question 6

What port does HTTP (HyperText Transfer Protocol) use?

Answer 6

TCP port 80

Question 7

What port does POP3 (Post Office Protocol 3) use?

Answer 7

TCP port 110

Question 8

What port does SSL (Secure Socket Layer) use?

Answer 8

TCP port 443

Question 9

What port does DHCP (Dynamic Host Control Protocol) use?

Answer 9

UDP ports 67 and 68

Question 10

What port does TFTP (Trivial File Transfer Protocol) use?

Answer 10

UDP port 69

Question 11

What port does SNMP (Simple Network Management Protocol) use?

Answer 11

UDP port 161

Question 12

What is the VoIP (Voice over IP) entire reserved range of UDP ports?

Answer 12

16384 - 32767

Question 13

What port does DNS use?

Answer 13

Both TCP and UDP port 53