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Chapter 1:Introduction to Networks Instructor:<enter your name here> Click to edit Master subtitle style
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Chapter 1: Introduction to Networks
The Following CompTIA Network+ Exam Objectives Are Covered in This Chapter: 1.6 Differentiate between common network topologies • Mesh o Partial o Full • Bus • Ring • Star • Hybrid • Point-to-point • Point-to-multipoint • Client-server • Peer-to-peer 2
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What is a Network? Printer Host Host 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. 3
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What is a LAN? A local area network (LAN) is usually restricted to spanning a particular geographic location Servers Servers Switch Hub Marketing Sales Printer 4
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Let’s connect these LAN’s together…
Servers Servers Router Marketing Sales 5
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Hosts/Workstations communicate to a Server
Secure server room Servers Servers Switch Hub Sales Marketing 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. Hosts 6
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Wide Area Networks Servers Branch1 Internet Corp Branch2
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. 7
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MPLS Network Logical Connections Between Sites
Branch Offices MPLS Network Logical Connections Between Sites Corporate Office Each router assigns labels to data when the data heads toward the MPLS cloud MPLS is a switching mechanism that imposes labels (numbers) to data and then uses those labels to forward data when the data arrives at the MPLS network 8
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Peer-to-Peer Networking
Users Password Access Mickey !Tails? Full Pluto $NoKats Read Louie ^Wet#! Users Password Access Millie #Shorts? Read Mickey My!Ears? Louie ^Wet#! Full Millie Pluto Hub Users Password Access Millie #Shorts? Read Pluto &LittleTail! Full Louie ^Wet#! Mickey Users Password Access Millie #Shorts? Read Pluto &LittleTail! Full Mickey Hub Louie 9
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Client Server Networks
Millie Pluto Users Password Access Millie #Shorts? Read Pluto &LittleTail! Full Louie ^Wet#! Mickey --Earls? Write Hub Mickey Hub Louie Server 10
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Physical Topologies 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 11
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A Physical Bus Topology
Laser Printer Server S1 12
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Physical Star Topology
Hub 13
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A Physical Ring Topology
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A Physical MESH Topology
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Point-to-point Topologies
Serial Connection, Like a T1 between Routers Direct Ethernet or Wireless Cable Direct to Hub or Switch Hub 16
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Point-to-Multipoint Topology
Branch Offices Corporate Office 17
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Point-to-Multipoint Example 2
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Hybrid Topology Hub Physical Star, Logical Bus 19
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Backbones and Segments
Servers Backbone Segments Sales Marketing 20
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Summary Summary Exam Essentials Section Written Labs Review Questions
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