Click to edit Master subtitle style 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

What is a Network? 3 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. Printer Host

What is a LAN? 4 A local area network (LAN) is usually restricted to spanning a particular geographic location Hub Switch Servers Printer Marketing Sales

Let’s connect these LAN’s together… 5 Router Servers Marketing Sales

Hosts/Workstations communicate to a Server 6 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. Hub Switch Servers Marketing Sales Secure server room Hosts

Wide Area Networks 7 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. Servers Internet Corp Branch2 Branch1

MPLS 8 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 MPLS Network Logical Connections Between Sites Corporate Office Branch Offices Each router assigns labels to data when the data heads toward the MPLS cloud

Peer-to-Peer Networking 9 Hub UsersPasswordAccess Mickey!Tails?Full Pluto$NoKatsRead Louie^Wet#!Read UsersPasswordAccess Millie#Shorts?Read Pluto&LittleTail!Full Louie^Wet#!Full UsersPasswordAccess Millie#Shorts?Read MickeyMy!Ears?Read Louie^Wet#!Full UsersPasswordAccess Millie#Shorts?Read Pluto&LittleTail!Full Millie Mickey Pluto Louie

Client Server Networks 10 Hub UsersPasswordAccess Millie#Shorts?Read Pluto&LittleTail!Full Louie^Wet#!Full Mickey--Earls?Write Millie Mickey Pluto Louie Server

Physical Topologies 11 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 12 Server S1 Laser Printer

Physical Star Topology 13 Hub

A Physical Ring Topology 14

A Physical MESH Topology 15

Point-to-point Topologies 16 Serial Connection, Like a T1 between Routers Direct Ethernet or Wireless Cable Direct to Hub or Switch Hub

Point-to-Multipoint Topology 17 Branch Offices Corporate Office

Point-to-Multipoint Example 2 18

Hybrid Topology 19 Hub Physical Star, Logical Bus

Backbones and Segments 20 MarketingSales Servers Segments Backbone

Summary 21 Summary Exam Essentials Section Written Labs Review Questions