2.1 Common Network Ports

Question 1

FTP

Answer 1

tcp/20, tcp21

File Transfer Protocol

Sends and receives files between system

Question 2

SSH

Answer 2

tcp/22

Secure Shell

Encrypted console access

Question 3

Sends and receives files between system

Answer 3

FTP

tcp/20, tcp21

File Transfer Protocol

Question 4

Encrypted console access

Answer 4

SSH

tcp/22

Secure Shell

Question 5

Telnet

Answer 5

tcp/23

Telecommunication Network

Insecure console access

Question 6

SMTP

Answer 6

tcp/25

Simple Mail Transfer Protocol Transfer

Transfer email between mail servers

Question 7

Insecure console access

Answer 7

Telnet

tcp/23

Telecommunication Network

Question 8

Transfer email between mail servers

Answer 8

SMTP

tcp/25

Simple Mail Transfer Protocol

Question 9

tcp/20, tcp21

Answer 9

File Transfer Protocol

Sends and receives files between system

Question 10

DNS

Answer 10

udp/53, tcp/53
Domain Name System

Convert domain names to IP addresses

Question 11

DHCP

Answer 11

udp/67, udp/68

Dynamic Host Configuration Protocol

Automate the IP address configuraCon process

Question 12

Convert domain names to IP addresses

Answer 12

DNS

udp/53, tcp/53

Domain Name System

Question 13

Automate the IP address configuraCon process

Answer 13

DHCP udp/67, udp/68

Dynamic Host Configuration Protocol

Question 14

HTTP

Answer 14

tcp/80

Hypertext Transfer Protocol

Web server communicaCon

Question 15

HTTPS

Answer 15

tcp/443

Hypertext Transfer Protocol Secure

Web server communicaCon with encrypCon

Question 16

Web server communicaCon

Answer 16

HTTP

tcp/80

Hypertext Transfer Protocol

Question 17

Web server communicaCon with encrypCon

Answer 17

HTTPS

tcp/443

Hypertext Transfer Protocol Secure

Question 18

POP3

Answer 18

tcp/110

Post Office Protocol version 3

Receive email into a email client

Question 19

IMAP4

Answer 19

tcp/143

Internet Message Access Protocol v4

A newer email client protocol

Question 20

Receive email into a email client

Answer 20

POP3

tcp/110

Post Office Protocol version 3

Question 21

A newer email client protocol

Answer 21

IMAP4

tcp/143

Internet Message Access Protocol v4

Question 22

NetBIOS

Answer 22

udp/137

NetBIOS name service

Register, remove, and find Windows services by name

Question 23

NetBIOS

Answer 23

tcp/139

NetBIOS session service

Windows connecCon-oriented data transfer

Question 24

Register, remove, and find Windows services by name

Answer 24

NetBIOS

udp/137

NetBIOS name service

Question 25

Windows connecCon-oriented data transfer

Answer 25

NetBIOS tcp/139 NetBIOS session service

Question 26

SMB

Answer 26

tcp/445 Server Message Block Windows file transfers and printer sharing

Question 27

SNMP Query

Answer 27

udp/161 Simple Network Management Protocol Gather metrics and manage network devices

Question 28

Windows file transfers and printer sharing

Answer 28

SMB tcp/445 Server Message Block

Question 29

Gather metrics and manage network devices

Answer 29

SNMP Query udp/161 Simple Network Management Protocol

Question 30

SNMP Trap

Answer 30

udp/162 Simple Network Management Protocol Receive alerts from network devices

Question 31

LDAP

Answer 31

tcp/389 Lightweight Directory Access Protocol Directory services

Question 32

Receive alerts from network devices

Answer 32

SNMP Trap udp/162 Simple Network Management Protocol

Question 33

Directory services

Answer 33

LDAP tcp/389 Lightweight Directory Access Protocol

Question 34

RDP

Answer 34

tcp/3389 Remote Desktop Protocol Graphical display of remote devices

Question 35

Graphical display of remote devices

Answer 35

RDP tcp/3389 Remote Desktop Protocol