Well Known Ports

Question 1

Identify the commonly used UDP/TCP port (type and number) for…

FTP

Answer 1

TCP: 20, 21

Question 2

Identify the commonly used UDP/TCP port (type and number) for…

SSH

Answer 2

TCP: 22

Question 3

Identify the commonly used UDP/TCP port (type and number) for…

Telnet

Answer 3

TCP: 23

Question 4

Identify the commonly used UDP/TCP port (type and number) for…

SMTP

Answer 4

TCP: 25

Question 5

Identify the commonly used UDP/TCP port (type and number) for…

DNS

Answer 5

TCP and UDP: 53

Question 6

Identify the commonly used UDP/TCP port (type and number) for…

DHCP

Answer 6

UDP: 67

Question 7

Identify the commonly used UDP/TCP port (type and number) for…

TFTP

Answer 7

UDP: 69

Question 8

Identify the commonly used UDP/TCP port (type and number) for…

HTTP

Answer 8

TCP: 80

Question 9

Identify the commonly used UDP/TCP port (type and number) for…

POP3

Answer 9

TCP: 110

Question 10

Identify the commonly used UDP/TCP port (type and number) for…

NTP

Answer 10

TCP: 123

Question 11

Identify the commonly used UDP/TCP port (type and number) for…

IMAP4

Answer 11

TCP: 143

Question 12

Identify the commonly used UDP/TCP port (type and number) for…

SNMP

Answer 12

UDP: 161

Question 13

Identify the commonly used UDP/TCP port (type and number) for…

HTTPS

Answer 13

TCP: 443

Question 14

How many port numbers are there in total?

Answer 14

65,535

Question 15

Which port numbers are reserved?

Answer 15

0 to 1023