Networking Ports

Question 1

FTP (File Transfer Protocol)

Answer 1

TCP Port 21 to broker the connection
TCP Port 20 to transfer the data

Question 2

SSH (Secure Shell)

Answer 2

TCP Port 22

Question 3

Telnet

Answer 3

TCP Port 23

Question 4

SMTP (Simple Mail Transfer Protocol)

Answer 4

Originally used TCP Port 25
Now uses TCP Port 587 OR TCP Port 2525

Question 5

DNS (Domain Name System)

Answer 5

UDP Port 53

Question 6

HTTPS (Hypertext Transfer Protocol Secure)

Answer 6

TCP Port 443

Question 6

DHCP (Dynamic Host Configuration Protocol)

Answer 6

Server: UDP Port 67 for requests from clients
Clients: UDP 68 for a configuration response from the DHCP server

Question 6

HTTP (Hypertext Transfer Protocol)

Answer 6

TCP Port 80 or 8080

Question 6

POP3 (Post Office Protocol 3)

Answer 6

TCP Port 110

Question 7

POP3 (Post Office Protocol 3-SECURE)

Answer 7

TCP Port 995

Question 8

IMAP (Internet Message Access Protocol)

Answer 8

TCP Port 143

Question 9

IMAP (Internet Message Access Protocol-ENCRYPTED)

Answer 9

TCP Port 993

Question 10

NetBIOS (Network Basic Input/Output System)

Answer 10

UDP Port 137 to access another’s NetBIOS name
TCP/UDP 138 and 139 to transmit messages or commands