TCP/UDP Ports

Question 1

Telnet
Unsecure console access

Answer 1

TCP/23

Question 2

SSH/SFTP

Answer 2

TCP/22

Question 3

DNS

Answer 3

UDP/53

Question 4

SMTP

Answer 4

TCP/25 for plain text
TCP/587 for TLS encryption

Question 5

POP3 - Post Office Protocol v3

Answer 5

TCP/110 for plain text
TCP/995 for TLS encryption

Question 6

IMAP4 - Internet Message Access Protocol v4

Answer 6

TCP/143 for plain text
TCP/993 for TLS encryption

Question 7

FTP - File Transfer Protocol
Authenticates with username and password

Answer 7

TCP/20 for active data mode
TCP/21 for control

Question 8

TFTP - Trivial File Transfer Protocol
No authentication

Answer 8

UDP/69

Question 9

DHCP

Answer 9

UDP/67
UDP/68

Question 10

HTTP

Answer 10

TCP/80

Question 11

HTTPS

Answer 11

TCP/443

Question 12

SNMP

Answer 12

UDP/161

Question 13

Syslog

Answer 13

UDP/514

Question 14

RDP - Remote Desktop Protocol

Answer 14

TCP/3389

Question 15

NTP - Network Time Protocol

Answer 15

UDP/123

Question 16

SMB - Server Message Block
Used for file sharing and printer sharing

Answer 16

TCP/445

Question 17

LDAP/LDAPS (LDAP secure)

Answer 17

TCP/389

Question 18

Microsoft SQL Server

Answer 18

TCP/1433

Question 19

Oracle SQL *Net

Answer 19

TCP/1521

Question 20

MySQL

Answer 20

TCP/3306