Ports and Protocols

Question 1

Ports 20 and 21

Answer 1

FTP
File Transfer Protocol
Port 20 for data transfer
Port 21 for control

Question 2

Port 22

Answer 2

SSH
Secure Shell
Uses encryption and authentication to create a secure channel

Question 3

Port 25

Answer 3

SMTP
Simple Mail Transfer Protocol
Email servers listen on this port

Question 4

Port 53

Answer 4

DNS
Domain Name System
Resolves the name of a website to an IP address and vice versa

Question 5

Port 69

Answer 5

TFTP
Trivial File Transfer Protocol
Used to transfer router and backup router configurations

Question 6

Port 80

Answer 6

HTTP
Unsecured connection to web server

Question 7

Port 143

Answer 7

IMAP
Email clients use this port to retrieve email messages from a mail server, unsecured

Question 8

Port 443

Answer 8

HTTPS
Secure connection to web server

Question 9

Port 993

Answer 9

IMAPS
Secured version of IMAP

Question 10

Port 110

Answer 10

POP3- Post Office Protocol 3
Used to retrieve email from a mail server

Question 11

Port 119

Answer 11

Network News Transfer Protocol
Used to connect to a news server for use with newsgroups

Question 12

Port 135

Answer 12

RPC - Remote Procedure Call
Critical for the operation of Microsoft Exchange Server and Active Directory

Question 13

Port 139

Answer 13

NetBIOS
Used by NetBIOS Session Service to share resources

Question 14

Port 143

Answer 14

IMAP4
Retrieve mail