Ports

Question 1

Network Time Protocol (NTP)

Answer 1

UDP port 123

Question 2

Post Office Protocol v3 (POP3)

Answer 2

TCP port 995

Question 3

Post Office Protocol v3 (POP3) with STARTTLS

Answer 3

TCP port 110

Question 4

Internet Message Access Protocol with TLS/SSL (IMAP4)

Answer 4

TCP port 993

Question 5

Simple Mail Transfer Protocol Secure (SMTP)

Answer 5

TCP port 25

Question 6

Hypertext Transfer Protocol (HTTP)

Answer 6

TCP port 80

Question 7

Hypertext Transfer Protocol Secure (HTTPS)

Answer 7

TCP port 443

Question 8

Secure File Transfer Protocol (SFTP)

Answer 8

TCP port 22

Question 9

Internet Protocol Secure (IPSec)

Answer 9

UDP port 500

Question 10

Lightweight Directory Access Protocol (LDAP)

Answer 10

TCP/UDP port 389

Question 11

Secure Lightweight Directory Access Protocol (LDAPS)

Answer 11

TCP port 636

Question 12

Secure Shell (SSH)

Answer 12

TCP port 22

Question 13

Domain Name Service Secured (DNSSEC)

Answer 13

TCP/UDP ports 53

Question 14

Simple Network Management Protocol version 3 (SNMPv3)

Answer 14

UDP port 161

Question 15

SNMPv3 sending error messages

Answer 15

UDP port 162

Question 16

Domain Name Service (DNS)

Answer 16

TCP/UDP ports 53

Question 17

Kerberos

Answer 17

TCP port 88

Question 18

NetBios

Answer 18

TCP/UDP ports 137

Question 19

File Transfer Protocol (FTP) Data Transfer

Answer 19

TCP port 20

Question 20

File Transfer Protocol (FTP) Command Control

Answer 20

TCP port 21

Question 21

Secure Copy Protocol (SCP)

Answer 21

TCP port 22

Question 22

Telnet

Answer 22

TCP port 23

Question 23

Terminal Access Controller, Access Control System (TACACS+)

Answer 23

TCP port 49

Question 24

Dynamic Host Configuration Protocol (DHCP) Server Side

Answer 24

TCP port 67

Question 25

Dynamic Host Configuration Protocol (DHCP) Client Side

Answer 25

TCP port 68

Question 26

Trivial File Transfer Protocol (TFTP)

Answer 26

TCP port 69

Question 27

Internet Mail Application Protocol (IMAP)

Answer 27

TCP port 143

Question 28

Remote Authentication Dial-In User Services (RADIUS) Authentication

Answer 28

TCP ports 1812

Question 29

Remote Authentication Dial-In User Services (RADIUS) Accounting

Answer 29

TCP ports 1813

Question 30

Remote Desktop Protocol (RDP)

Answer 30

TCP port 3389