Common Networking Ports

Question 1

File Transfer Protocol?

Answer 1

20, 21

Question 2

20 & 21?

Answer 2

File Transfer Protocol - Unsecured file transfers

Question 3

Secure Shell File Transfer Protocol

Answer 3

22

Question 4

22?

Answer 4

SSH FTP - Secured file transfer protocol

Question 5

Telnet?

Answer 5

23

Question 6

23?

Answer 6

Telnet - Bidirectional interactive text based communication using virtual terminal connection

Question 7

Simple Mail Transfer Protocol

Answer 7

25

Question 8

25?

Answer 8

SMTP - Internet standard for sending email

Question 9

Domain Name Service

Answer 9

53

Question 10

53?

Answer 10

DNS - Hierarchical naming service, converts domains to IP and vice versa

Question 11

Dynamic Host Control Protocol

Answer 11

67 & 68

Question 12

67 & 68

Answer 12

DHCP - Automatically assigns IP addresses to your clients to simplify network admin

Question 13

Trivial File Transfer System

Answer 13

69

Question 14

69?

Answer 14

TFTS - Sends trivial files through a network - commonly used to send configurations to network devices. Can boot operating system through this - stripped version of 20,21!

Question 15

Hyper Text Transfer Protocol

Answer 15

80

Question 16

80?

Answer 16

HTTP - All insecure internet browsing

Question 17

Post Office Protocol Version Three

Answer 17

110

Question 18

110?

Answer 18

POPv3 - Used for retrieving emails from server - doesn’t synchronise read status, so less helpful across multiple end clients

Question 19

Network Time Protocol

Answer 19

123

Question 20

123

Answer 20

NTP - Keeping a local time for clients on a network

Question 21

Network Basic Input Output Services

Answer 21

139

Question 22

139

Answer 22

NetBIOS - Used for file sharing or printer sharing in Windows environments

Question 23

Internet Message Access Protocol

Answer 23

143

Question 24

143

Answer 24

IMAP - Improved email retrieval over TCP/IP - Will synchronise with the server for multiple clients

Question 25

Simple Network Management Protocol

Answer 25

161

Question 26

161

Answer 26

SNMP - Can be used to collect information on netowrk devices in the environment. Can also be used to modify behaviour, and monitor uptime

Question 27

Hyper Text Transfer Protocol Secure

Answer 27

443

Question 28

443

Answer 28

HTTPS - All secure internet browsing - ecommerce, banking etc

Question 29

Server Message Block

Answer 29

445

Question 30

445

Answer 30

SMB - Provides shared access to files, printers and misc communications between devices on a network

Question 31

System Logging Protocol

Answer 31

514

Question 32

514

Answer 32

SysLOG - Used for sending logs back to a centralised point - MSS, EDR etc

Question 33

Simple Mail Transfer Protocol Transport Layer Security

Answer 33

587

Question 34

587

Answer 34

SMTP TLS - Used for sending encrypted emails

Question 35

Lightweight Directory Access Services Secure

Answer 35

636

Question 36

636

Answer 36

LDAP-S - Secure method of providing directory services

Question 37

Internet Message Access Protocol Secure

Answer 37

993

Question 38

Post Office Protocol Version Three Secure

Answer 38

995

Question 39

995

Answer 39

POPv3-S - Provides the same services as 110 with the sae drawbacks, however secure

Question 40

Structured Query Language Server Protocol

Answer 40

1433

Question 41

1433

Answer 41

SQL - Used for communicating with a windows database or server

Question 42

Structured Query Language Network Protocol

Answer 42

1521

Question 43

1521

Answer 43

SQLnet - Used for communicating with Oracle servers

Question 44

MySQL

Answer 44

3306

Question 45

3306

Answer 45

MySQL - Used for communicating with a server on the MySQL database engine - that is an opensource SQL system

Question 46

Remote Desktop Protocol

Answer 46

3389

Question 47

3389

Answer 47

RDP - Windows control program, provides a full graphical interface compared with 23 where it is only text

Question 48

Session Initiation Protocol

Answer 48

5060, 5061

Question 49

5060, 5061

Answer 49

SIP - Session Initiation Protocol - Provides signaling and controlling multimedia communication sessions. Used for VOIP services, voice and video calls and instant messaging

Question 50

Secure Shell

Answer 50

22

Question 51

22

Answer 51

SSH - Cryptographic network protocol, providing secure connection on insecure network. Best known for remote login to computer system

Question 52

Lightweight Directory Access Protocol

Answer 52

389

Question 53

389

Answer 53

LDAP - Insecure directory services

Question 54

993

Answer 54

IMAP-S - Secure way to receive and send encrypted emails