ch01-Introduction to Networks.ppt

CYB201 Chapter 1:Introduction Click to edit to Networks Master subtitle style Chapter 1: Introduction to Networks The Following CompTIA Network+ Exam Objectives Are Covered in This Chapter: 1. Compare and contrast the characteristics...

CYB201 Chapter 1:Introduction Click to edit to Networks Master subtitle style Chapter 1: Introduction to Networks The Following CompTIA Network+ Exam Objectives Are Covered in This Chapter: 1. Compare and contrast the characteristics of network topologies, types, and technologies. Wired topologies Logical vs. Physical Star Ring Mesh Bus 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? A local area network (LAN) is usually restricted to spanning a particular geographic location. Servers Servers Switch Hub Marketing Sales Printer 4  Let’s Connect These LAN’s Together… Servers Servers Router Marketing Sales 5  Communicate to a Server Secure server Servers room Servers Hub Switch Sales Marketing The term host is used to describe pretty much anything that Hosts 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. 6  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 Passwor Access Users Passwor Access d d Millie Pluto Micke !Tails? Full Millie #Shorts? Read y Micke My!Ears? Read Pluto $NoKats Read y Louie ^Wet#! Read Hub Louie ^Wet#! Full Users Passwor Access Mickey Hub Louie Users Passwor Access d d Millie #Shorts? Read Millie #Shorts? Read Pluto &LittleTail Full Pluto &LittleTail Full ! ! Louie ^Wet#! Full Micke &&Boss! Full y @ 9 Client Server Networks Millie Pluto Users Passwor Access d Hub Millie #Shorts? Read Pluto &LittleTail Full Mickey Hub Louie ! Server Louie ^Wet#! Full Micke --Earls? Write y 10 Physical Topologies Here is a list of the various topologies you’re most likely to run into 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 Exam Essentials Section Written Labs Review Questions 21