Ports

Question 1

Port 20 and 21

Answer 1

File transfer protocol. FTP is for transferring files between a client and a server

Question 2

Port 22

Answer 2

Secure Shell(SSH) tunneling protocol that creates secure network connections

Question 3

Port 25

Answer 3

Simple Mail Transfer Protocol(SMTP). Used for email

Question 4

Port 53

Answer 4

Domain Name System. DNS is an essential process for the modern Internet. It matches human readable domain names to machine readable IP addresses

Question 5

Port 80

Answer 5

Hypertext Transfer Protocol(HTTP). HTTP is the protocol that makes the World Wide Web possible

Question 6

Port 123

Answer 6

Network Time Protocol(NTP). NTP allows computer clocks to sync with each other, a process that is essential for encryption

Question 7

Port 179

Answer 7

Border Gateway Protocol(BGP). BGP is essential for establishing efficient routes between the large networks that make up the Internet (these large networks are called autonomous systems.) autonomous systems use BGP to broadcast which IP addresses they control

Question 8

Port 443

Answer 8

HTTP secure (HTTPS). HTTPS is the secure and encrypted version of HTTP.

Question 9

Port 500

Answer 9

Internet Security Association and Key Management Protocol (ISAKMP), which is part of the process of setting up secure IPsec connections

Question 10

Port 587

Answer 10

Modern, secure SMTP that uses encryption

Question 11

Port 3389

Answer 11

Remote Desktop Protocol (RDP). RDP enables users to remotely connect to their desktop computers from another device