Summary of Network Devices - CompTIA A+ 220-1101 - 2.2

00:00:00 - 00:15:00

This video discusses different types of network devices and their purpose. It explains that routers forward traffic between different ip subnets, and switches can forward traffic at high rates of speed. The video also discusses how to power devices on a network and the different types of power available for different devices.

• 00:00:00 A network device is a device used for network communication. Routers forwards traffic between different ip subnets, and switches can forward traffic at high rates of speed.
• 00:05:00 This video explains the differences between a network access point (AP), a switch, and a traditional firewall, and how they each help connect users to the network. The AP bridges wired and wireless connections, the switch forwards traffic between ports, and the firewall is the device that connects directly to the internet. When users move between desks or switch connections need to be moved, a patch panel can be used to make these changes quickly and easily.
• 00:10:00 The video discusses how to power devices on a network through power over Ethernet (Poe), which is a type of power over network. Different devices need different types of power and there are different standards for Poe. A traditional Poe standard is called IEEE 802.3af, which provides 15.4 watts of DC power with 350 milliamps as the max current. In 2009, IEEE 802.380 was introduced, which provides additional power 25.5 watts of DC power with a maximum milliamp current of 600 milliamps. The most modern Poe standard is IEEE 802.3bt, which provides 51 watts of DC power with 960 milliamps as the max current.
• 00:15:00 This video discusses the different types of network devices and their associated networks. It explains that, for wired networks, there are network interface cards that allow for easy connection to various types of networks. For wireless networks, there are also network interface cards, which can be inserted into a laptop or desktop computer to increase its capabilities.