Chapter 1:Introduction to Networks • 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? 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 What is a LAN? Servers A local area network (LAN) is usually restricted to spanning a particular geographic location Switch Marketing Servers Hub Sales Printer 4 Let’s connect these LAN’s together… Servers Servers Router Marketing Sales 5 Hosts/Workstations communicate to a Server Secure server room Servers Servers Hub Sales Hosts Switch 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 6 having a network. 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 MPLS Branch Offices Corporate Office MPLS Network Logical Connections Between Sites 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 Peer-to-Peer Networking Users Password Access Users Password Access Mickey !Tails? Full Millie #Shorts? Read Pluto $NoKats Read Mickey My!Ears? Read Louie ^Wet#! Read Louie ^Wet#! Full Users Password Access Millie #Shorts? Read Pluto Millie Hub Users Password Access Millie #Shorts? Read Pluto &LittleTail! Full Pluto &LittleTail! Full Louie ^Wet#! Full Mickey &&Boss!@ Full Mickey Hub Louie 9 Client Server Networks Pluto Millie Hub Mickey Hub Louie Server Users Password Access Millie #Shorts? Read Pluto &LittleTail! Full Louie ^Wet#! Full Mickey --Earls? Write 10 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 A Physical Bus Topology Laser Printer Server S1 12 Physical Star Topology Hub 13 A Physical Ring Topology 14 A Physical MESH Topology 15 Point-to-point Topologies Serial Connection, Like a T1 between Routers Direct Ethernet or Wireless Cable Direct to Hub or Switch Hub 16 Point-to-Multipoint Topology Branch Offices Corporate Office 17 Point-to-Multipoint Example 2 18 Hybrid Topology Hub Physical Star, Logical Bus 19 Backbones and Segments Servers Backbone Segments Sales Marketing 20 Summary • • • • Summary Exam Essentials Section Written Labs Review Questions 21
