Ports

Question 1

FTP

Answer 1

20/21 (TCP)

File Transfer Protocol (FTP) uses ports 20 (data transfer) and 21 (control) for transferring files, though FTP is known for lacking encryption and is considered less secure.

Question 2

SSH

Answer 2

22 (TCP)

Secure Shell (SSH) uses port 22 for secure remote login and command execution, offering a more secure alternative to Telnet.

Question 3

Telnet

Answer 3

23 (TCP)

Telnet uses port 23 for remote login and command execution, but it’s unencrypted and less secure than SSH.

Question 4

SMTP

Answer 4

25 (TCP)

Simple Mail Transfer Protocol (SMTP) uses port 25 for sending emails and is used by email client applications on users.

Question 5

DNS

Answer 5

53 (TCP/UP)

Domain Name System (DNS) uses port 53 for translating domain names to IP addresses, and is a critical service for internet communication.

Question 6

HTTP

Answer 6

80 (TCP)

Hypertext Transfer Protocol (HTTP) uses port 80 for unencrypted web traffic, and is used by websites and web applications.

Question 7

HTTPS

Answer 7

443 (TCP)

Hypertext Transfer Protocol Secure (HTTPS) uses port 443 for encrypted web traffic, and is the standard for secure web browsing.

Question 8

POP3

Answer 8

110 (TCP)

Post Office Protocol version 3 (POP3) uses port 110 for receiving email, and is another protocol used by email client applications.

Question 9

IMAP

Answer 9

143 (TCP)

Internet Message Access Protocol (IMAP) uses port 143 for receiving email, and is another protocol used by email client applications.

Question 10

RDP

Answer 10

3389 (TCP)

Remote Desktop Protocol (RDP) uses port 3389 for remote desktop access and is used to remotely access and control any device anywhere in the world.

Question 11

HTTP Proxy

Answer 11

8080
HTTP Proxy: Used for HTTP traffic through a proxy server.

Question 12

NetBIOS

Answer 12

137/138/139 (TCP/UDP)

NetBIOS over TCP uses ports 137 and 139 for network communication and is commonly used for file sharing and other network services.

Question 13

SMB

Answer 13

445 (TCP)

Server Message Block uses port 445 for file sharing and other network services and is a Windows proprietary protocol built on NetBIOS.

Question 14

SQL Server

Answer 14

1433 (TCP)

Microsoft SQL Server uses port 1443 for database connections and is a common security risk if not properly secured.

Question 15

MySQL

Answer 15

3306 (TCP)

MySQL uses port 3306 for database connections and is another common database service.

Question 16

VNC

Answer 16

5900 (TCP)

Virtual Network Computing (VNC) uses port 5900 for remote desktop access and is another alternative to RDP.

Question 17

TFTP

Answer 17

69 (UDP)

Trivial File Transfer Protocol

Question 18

Kerberos

Answer 18

88 (UDP)

Question 19

POP3

Answer 19

110 (TCP)

Post Office Protocol

Question 20

NNTP

Answer 20

119 (TCP)

Network News Transfer Protocol

Question 21

RPC

Answer 21

135 (TCP/UDP)

Remote Procedure Call

Question 22

SNMP

Answer 22

161 (UDP)

Simple Network Management Protocol

Question 23

SNMPTrap

Answer 23

162 (UDP)

Question 24

LDAP

Answer 24

389 (TCP)

Lightweight Directory Access Protocol

Question 25

SMTPS

Answer 25

465, 587 (TCP) SMTP Secure

Question 26

Syslog

Answer 26

514 (UDP) Syslog Server

Question 27

LDAPS

Answer 27

636 (TCP) LDAP Secure

Question 28

IMAPS

Answer 28

993 (TCP) IMAP over SSL/TLS

Question 29

POP3S

Answer 29

995 (TCP) POP3 over SSL/TLS

Question 30

RADIUS

Answer 30

1645, 1646 (TCP) RADIUS Remote Authentication

Question 31

Syslog TLS

Answer 31

6514 (TCP)