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Lesson 8. Networking Configuration and T... > Understanding Networking Concepts

Understanding Networking Concepts

Before you troubleshoot networking problems, you need to understand the basic concepts of how computers communicate, whether across the room or around the world.

If every computer in the world could be connected to one single Ethernet network, your computer would be able to send data directly to every other computer. However, computers are actually linked to a collection of connected networks. The largest IP networks are made up of smaller networks. Large networks, which span a large logical area, are called wide area networks, or WANs. As networks become smaller and more specific to an audience, they are called local area networks, or LANs. Finally, LANs can be divided into physical or logical subnetworks or subnets. Although the distinction between LAN and WAN is arbitrary, you can think of a LAN as the devices in your network you can touch without leaving the building, and a WAN as all the network devices beyond the building's walls.


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