Ports and Protocols

Question 1

FTP

Answer 1

• Ports 20, 21
• No encryption

Question 2

SFTP

Answer 2

• Port 22
• Funnels FTP through SSH

Question 3

SSH

Answer 3

• Port 22
• Secure remote control of another machine

Question 4

Telnet

Answer 4

• Port 23
• Insecure remote control of another machine

Question 5

SMTP

Answer 5

• Port 25
• Provides ability to send emails over network

Question 6

DNS

Answer 6

• Port 53
• Converts domain names to IP addresses and reverse

Question 7

DHCP

Answer 7

• Ports 67, 68
• Automatically provides network parameters to your clients

Question 8

TFTP

Answer 8

• Port 69
• Stripped down version of FTP
• Doesn’t provide authentication
• Used to send config files or network booting of an operating system

Question 8

HTTP

Answer 8

• Port 80
• Insecure web browsing

Question 9

POP3

Answer 9

• Port 110
• For RECEIVING incoming emails
• Store & forward method

Question 10

NTP

Answer 10

• Port 123
• Keeps internal clients’ clocks updated and accurate on a network

Question 11

NetBIOS (Network Basic Input/ Output System)

Answer 11

• Port 139
• Used for file/ printer sharing in a Windows network

Question 12

IMAP (Internet Message Access Protocol)

Answer 12

• Port 143
• Newer method of retrieving incoming emails
• Improves upon POP3

Question 13

SNMP (Simple Network Management Protocol)

Answer 13

• Ports 161, 162
• Used to collect data about network devices and monitor status

Question 14

LDAP

Answer 14

• Port 389
• Used to provide insecure directory services to a network
• Like Windows Active Directory but not strictly for Windows (which also uses port 389)

Question 15

HTTPS

Answer 15

• Port 443
• Uses SSL or TSL for secure web browsing

Question 16

SMB (Server Message Block)

Answer 16

• Port 445
• Used for Windows file and printer sharing
• Operates often on top of NetBIOS but does not need it strictly to operate

Question 17

Syslog (System Logging Protocol)

Answer 17

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

Question 18

SMTP TLS

Answer 18

• Port 587
• Secure and encrypted way to send emails

Question 19

LDAPS

Answer 19

• Port 636
• Secure directory services

Question 20

IMAP over SSL

Answer 20

• Port 993
• Secure and encrypted way to receive emails

Question 21

POP3 over SSL

Answer 21

• Port 995
• Secure and encrypted way to receive emails

Question 22

SQL (Structured Query Language)

Answer 22

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

Question 23

SQLnet

Answer 23

• Port 1521
• Client to Oracle database

Question 24

MySQL

Answer 24

- Port 3306 - Communication from client to MySQL database engine - Open source Protocol

Question 25

RDP (Remote Desktop Protocol)

Answer 25

- Port 3389 - Remote control of another machine with full graphics (like one's sitting at the computer locally)

Question 26

SIP (Session Initiation Protocol)

Answer 26

- Ports 5060, 5061 - Used to initiate VoIP and video calls