N+ Port Numbers

Question 1

File Transfer Protocol FTP

Answer 1

Port 20, 21

File Transfer

Question 2

Secure Shell SSH / SSH File Transfer Protocol SFTP

Answer 2

(Port 22)

Secure Remote Access / File Transfer Protocol

Question 3

Telnet

Answer 3

(Port 23)

Unsecure Remote Access

Question 4

Simple Mail Transfer Protocol SMTP

Answer 4

(Port 25)

Sending Emails

Question 5

Domain Name Service DNS

Answer 5

(Port 53)

Converts domain names to IP addresses

Question 6

Dynamic Host Control Protocol DHCP

Answer 6

(Port 67, 68)

Assigns IP Addresses

Question 7

Trivial File Transfer TFTP

Answer 7

(Port 69)

Essentially a stripped-down version of FTP

Question 8

Hyper Text Transfer HTTP

Answer 8

(Port 80)

WWW - Web browsing

Question 9

Post Office Protocol v3 POP3

Answer 9

(Port 110)

Receive Emails

Question 10

Network Time Protocol NTP

Answer 10

(Port 123)

Provides clock synchronization between computer systems over packet-switched, variable-latency data networks

Question 11

NetBIOS

Answer 11

(Port 139)

Windows File Sharing

Question 12

Internet Mail Application IMAP

Answer 12

(Port 143)

Receiving Emails

Question 13

Simple Network Management SNMP

Answer 13

(Port 161)

Network Management

Question 14

Lightweight Directory Access LDAP

Answer 14

(Port 389)

▪ LDAP and Active Directory use this port

Question 15

HTTP Secure HTTPS

Answer 15

(Port 443)

Secure Web Browsing

Question 16

Server Message Block SMB

Answer 16

(Port 445)

Windows File Sharing

Question 17

LDAP Secure LDAPS

Answer 17

(Port 636)

LDAP and Active Directory use this port

Question 18

Remote Desktop Protocol RDP

Answer 18

(Port 3389)

Remote Desktop

Question 19

Session Initiation Protocol SIP

Answer 19

(Port 5060, 5061)

Real-Time Audio (VoiP