Ports & Protocols

Question 1

FTP (File Transfer Protocol)

Answer 1

Port 20 & 21
Provides insecure file transfers

Question 2

SFTP (Secure File Transfer Protocol)

Answer 2

Port 22
Provides secure file transfer

Question 3

SSH (Secure Shell)

Answer 3

Port 22
Provides secure remote control of another machine using a text based environment

Question 4

Telnet

Answer 4

Port 23
Provides insecure remote control of another machine using a text-based environment

Question 5

Simple Mail Transfer Protocol (SMTP)

Answer 5

Port 25
Provides the ability to send emails over the network

Question 6

DNS (Domain Name Service)

Answer 6

Port 53
Converts domain names to IP addresses, and IP addresses to domain names

Question 7

DHCP (Dynamic Host Configuration Protocol)

Answer 7

Ports 67 & 68
Automatically provides network parameters to your clients, such as assigned IP address, subnet mask, default gateway, and the DNS server they should use

Question 8

TFTP (Trivial File Transfer Protocol)

Answer 8

Port 69
Used as a lightweight file transfer method for sending configuration files or network booting of an operating system

Question 9

HTTP (Hypertext Transfer Protocol)

Answer 9

Port 80
Used for insecure web browsing

Question 10

POP3 (Post Office Protocol Version Three)

Answer 10

Port 110
Used for receiving incoming emails

Question 11

NTP (Network Time Protocol)

Answer 11

Port 123
Used to keep accurate time for clients on a network

Question 12

NetBIOS (Network Basic Input/Output System)

Answer 12

Port 139
Used for file or printer sharing in a Windows network

Question 13

IMAP (Internet Mail Application Protocol)

Answer 13

Port 143
A newer method of retrieving incoming emails which improves upon the older POP3

Question 14

SNMP (Simple Network Management Protocol)

Answer 14

Port 161, 162
Used to collect data about network devices and monitor their status

Question 15

LDAP (Lightweight Directory Access Protocol)

Answer 15

Port 389
Used to provide directory services to your network

Question 16

HTTPS (Hypertext Transfer Protocol - Secure)

Answer 16

Port 443
Used for secure web browsing via SSL (Secure Socket Layer) or TLS (Transport Layer Security)

Question 17

SMB (Server Message Block)

Answer 17

Port 445
Used for windows file and printer sharing services

Question 18

Syslog (System Logging Protocol)

Answer 18

Port 514
Used to send logging data back to a centralized server

Question 19

SMTP TLS (Simple Mail Transfer Protocol Transport Layer Security)

Answer 19

Port 587
Secure and encrypted way to send emails

Question 20

LDAPS (Lightweight Directory Access Protocol - Secure)

Answer 20

Port 636
Provides secure directory services

Question 21

IMAP over SSL (Internet Message Access Protocol over SSL)

Answer 21

Port 993
Secure and encrypted way to receive emails

Question 22

POP3 over SSL (Post Office Protocol V3 over SSL)

Answer 22

Port 995
Secure and encrypted way to receive emails

Question 23

SQL (Structured Query Language Server Protocol)

Answer 23

Port 1433
Used for communication from a client to the database engine

Question 24

SQLnet Protocol

Answer 24

Port 1521
Used for communication from a client to an Oracle database

Question 25

MySQL

Answer 25

Port 3306
Used for communication from a client to the MySQL database engine

Question 26

RDP (Remote Desktop Protocol)

Answer 26

Port 3389
Provides graphical remote control of another client or server

Question 27

SIP (Session Initiation Protocol)

Answer 27

Port 5060, 5061
Used to initiate VoIP and video calls