https

CompTIA A+ 220-701: 4.1 – Common Ports

The TCP and UDP protocols use ports to associate application communication between devices. In this video, you’ll get an overview of ports and you’ll learn which ports are most commonly found on the network.

CompTIA Network+ N10-004: 6.5 – Device Security

The security of the devices on our network must be managed through both physical and technological means. In this video, you’ll learn the importance of good physical security, methods to restrict local and remote access to our devices, and the applications and protocols that you can use to build a more secure networking environment.