Port Number functions

Question 1

FTP - File Transfer Protocol

Answer 1

Sends and receives files between systems

Question 2

SSH - Secure Shell

Answer 2

Encrypted console access

Question 3

Telnet

Answer 3

Insecure console access

Question 4

SMTP - Simple Mail Transfer Protocol

Answer 4

Transfer email between mail servers. Also used to send mail from devices

Question 5

DNS - Domain Name System

Answer 5

Convert domain names to IP Addresses

Question 6

DHCP - Dynamic Host Configuration Protocol

Answer 6

Automate the IP Address configuration process

Question 7

HTTP - Hypertext Transfer Protocol

Answer 7

Web server communication

Question 8

HTTPS - Hypertext Transfer Protocol Secure

Answer 8

Web server communication with encryption

Question 9

POP3 - Post Office Protocol v3

Answer 9

Receive email into an email client (basic mail transfer functionality)

Question 10

IMAP4 - Internet Message Access Protocol v4

Answer 10

A newer email client protocol (includes email inbox management)

Question 11

udp/137 NetBIOS name service

Answer 11

register, remove and find windows services by name

Question 12

tcp/139 NetBIOS session service

Answer 12

Windows connection-oriented data transfer

Question 13

SMB - Server Message Block

Answer 13

Windows file transfer and printer sharing

Question 14

udp/161 - SNMP Query - Simple Network Management Protocol

Answer 14

Gather metrics and manage network devices

Question 15

udp/162 - SNMP Trap

Answer 15

Receive alerts from network devices

Question 16

LDAP - Lightweight Directory Access Protocol

Answer 16

Store and retrieve information in a network directory
– Commonly used in Microsoft Active Directory

Question 17

RDP - Remote Desktop Protocol

Answer 17

Share desktop from remote location