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Chapter 1:Introduction to NetworksInstructor:Thomas W Bell

Chapter 1: Introduction to Networks

The Following CompTIA Network+ Exam Objectives Are Covered in This Chapter:

3.5 Describe different network topologies.

• MPLS

• Point-to-point

• Point-to-multipoint

• Ring

• Star

• Mesh

• Bus

• Peer-to-peer

• Client-server

• Hybrid2

What is a Network?

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In the computer world, the term network means two or more connected computers that can share resources like data and applications, office machines, an Internet connection, or some combination of these.

What is a LAN?

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A local area network (LAN) is usually restricted to spanning a particular geographic location

Let’s connect these LAN’s together…

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Hosts/Workstations communicate to a Server

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The term host is used to describe pretty much anything that takes an IP address. You also see that the hosts can access the servers across the network—pretty much the general idea of having a network.

Wide Area Networks

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•Usually need a router port or ports.•Span larger geographic areas and/or can link disparate locations.•Are usually slower.•Can choose when and how long we connect to a WAN. •Can utilize either private or public data transport media such as phone lines.

MPLS

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MPLS is a switching mechanism that imposes labels (numbers) to data and then usesthose labels to forward data when the data arrives at the MPLS network

Peer-to-Peer Networking

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Client Server Networks

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Physical Topologies

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Here is a list of the various topologies you’re most likely to run in to these days:– Bus

– Star

– Ring

– Mesh

– Point-to-point

– Point-to-multipoint

– Hybrid

A Physical Bus Topology

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Physical Star Topology

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A Physical Ring Topology

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A Physical MESH Topology

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Point-to-point Topologies

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Point-to-Multipoint Topology

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Point-to-Multipoint Example 2

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Hybrid Topology

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Backbones and Segments

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Summary

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• Summary

• Exam Essentials Section

• Written Labs

• Review Questions