Unit 4, Lesson 9 Network Topologies NAF Principles of Information Technology Copyright © 2007–2015 National Academy Foundation. All rights reserved.

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Unit 4, Lesson 9 Network Topologies NAF Principles of Information Technology Copyright © 2007–2015 National Academy Foundation. All rights reserved.

There are many ways to set up a computer network What are some types of networks you’ve learned about so far?

Topology is the study of how things are arranged Have you ever thought about how your classroom is arranged? Why are desks and tables placed where they are? Is the topology different from what you see in this Japanese classroom? Topology refers to how things relate to each other in space—how they are organized. Network topology refers to the layout of devices that are connected on a computer network. Japanese high school classroom

Bus topology has a central cable A bus LAN

A ring topology is a closed loop A ring LAN

A star LAN has a hub and many spokes A star LAN

In a mesh LAN, devices can be fully or partially connected A fully connected mesh LAN A partially connected mesh LAN

A tree LAN is also called a hierarchical network A tree LAN

The topologies of WANs are not so easily defined Because wide area networks (WANs) cover a large geographic area, it is difficult to define the topology. In this diagram, the linked machines could be in the same building, in different buildings, or even in different countries.

Cables connect devices in a network Partially stripped Ethernet cable showing the twisted wire pairs Network components are most often connected using cables. An Ethernet cable, shown here, is the most common type of network cable.

All networks help users share resources All network topologies have a common goal: to enable users to share resources and data. Which network topology type would you use at home? At school? In an office? Which network topology type would you use at home? At school? In an office?