Ports

Question 1

FTP

Answer 1

File transfer Protocol
TCP 22, 20
Transfers files in clear text between client and server

Question 2

SSH

Answer 2

Secure Shell
TCP 22
Securely access and manage remote systems over an encrypted connection

Question 3

SFTP

Answer 3

Secure File Transfer Protocol
TCP 22
Transfers files over an encrypted connection

Question 4

Telnet

Answer 4

TCP 23
Unencrypted text-based remote control protocol

Question 5

SMTP

Answer 5

Simple Mail Transfer Protocol
TCP 25
For sending emails, client-to-server or server-to-server

Question 6

DNS

Answer 6

Domain Name System
UDP/TCP 53
A hierarchical protocol that translates human-readable domain names into IP address

Question 7

DHCP

Answer 7

Dynamic Host Configuration Protocol
UDP 67,68
Automatically assigns IP address, Subnet mask, DNS, default Gateway

Question 8

TFTP

Answer 8

Trivial File Transfer Protocol
UDP 69
A simple, lightweight protocol used for transferring files without authentication

Question 9

HTTP

Answer 9

Hypertext Transfer Protocol
TCP 80
Used for transferring hypertext (webpage) between a client (browser) and a server

Question 10

SNMP

Answer 10

Simple Network Management Protocol
UDP 162/162
Used to centrally monitor, manage and configure network devices

Question 11

LDAP

Answer 11

Lightweight Directory Access Protocol
TCP 389
Used to access and manage directory service data

Question 12

HTTPS

Answer 12

Hypertext Transfer Protocol Secure
TCP 443
SSL/TLS encrypted version of HTTP used to make a secure connection to a webpage

Question 13

SMB

Answer 13

Server Message Block
TCP 445
File and print sharing protocol for windows systems

Question 14

Syslog

Answer 14

UDP 514
Standard protocol for logging system messages and events in a centralised server

Question 15

SMTPS

Answer 15

Simple Mail Transfer Protocol Secure
TCP 636
SSL/TLS encrypted version of SMTP used to send emails securely

Question 16

LDAPS

Answer 16

Lightweight Directory Access Protocol over SSL
TCP 636
SSL/TLS encrypted version of LDAP for making a secure connection to a directory service

Question 17

SQL

Answer 17

Structured Query Language
TCP 1433
Standardized language used to manage, query and manipulate data in relational databases

Question 18

RDP

Answer 18

Remote Desktop Protocol
TCP 3389
Microsoft proprietary protocol for GUI-based remote control of another computer

Question 19

SIP

Answer 19

Session Initiation Protocol
TCP 5060/5061*
A signalling protocol used to initiate, manage and terminate voice, video and messaging communication sessions over IP networks

Question 20

NTP

Answer 20

Network Time Protocol
UDP 123
Used to synchronize the clocks of computers and devices on a network to a precise time reference