Networking Ports

Question 1

20, 21

Answer 1

FTP

File Transfer Protocol

Sends and receives files between systems

Question 2

22

Answer 2

SSH

Secure Shell

Encrypted console access

Question 3

23

Answer 3

TELNET

Telecommunication Network

Insecure console access

Question 4

25

Answer 4

SMTP

Simple Mail Transfer Protocol

Transfer email between mail services

Question 5

53

Answer 5

DNS

Domain Name System

Convert domain names to IP addresses

Question 6

80

Answer 6

HTTP

Hypertext Transfer Protocol

Web server communicaCon

Question 7

110

Answer 7

POP3

Post Office Protocol

Web server communication with encryption

Question 8

143

Answer 8

IMAP4

Internet Message Access Protocol

Includes management of email inbox from multiple clients;

Newer email client protocol

Question 9

443

Answer 9

HTTPS

Hypertext Transfer Protocol Secure

Web server communication with encryption.

Question 10

3389

Answer 10

RDP

Remote Desktop Protocol

Share a desktop from a remote location​

Question 11

137-139

Answer 11

NetBIOS

Network Basic Input/Output System

• Register, remove, and find windows services by name (137)
• Windows connectionless data transfer (138)
• Windows connection-oriented data transfer(139)

Question 12

445

Answer 12

SMB

Server Message Block

Windows file transfer and printer sharing

CIFS

Common Internet File System

CIFS is a network file service protocol developed by Microsoft. It is used in conjunction with TCP/IP to facilitate file sharing across multiple platforms for a large number of simultaneous users.

Question 13

427

Answer 13

SLP

Service Location Protocol

Find Mac OS services by name

Question 14

548

Answer 14

AFP

Apple Filing Protocol

Mac Os File transfers

In macOS, AFP is one of several file services supported, with others including Server Message Block (SMB), Network File System (NFS), File Transfer Protocol (FTP), and WebDAV.

Question 15

67 & 68

Answer 15

DHCP

Dynamic Host Configuration Protocol

DHCP is a protocol used to assign an IP address to a computer or device connected to a network automatically.

• If the network has a firewall, ports 67 and 68 need to be open for devices to function properly.

Question 16

389

Answer 16

LDAP

Lightweight Directory Access Protocol

Directory service;

LDAP is an Internet protocol that runs over TCP.
Most e-mail clients today and in the future contain this protocol or OpenLDAP.

Question 17

161 &162

Answer 17

SNMP

Simple Network Management Protocol

Gather statistics from network devices

Question 18

UDP

Answer 18

UDP

User Datagram Protocol

UDP is an alternative protocol to the TCP/IP that runs on top of IP and is sometimes referred to as UDP/IP.

Unlike TCP/IP, UDP does not divide each transmission into packets, which allows for a faster transmission. However, UDP does not provide error checking.