Basic Network Management - Chapter 3: Network Computer

Chapter 3: Network ComputerObjective What is a Network?Why we use a Network?Advantages of LANTypes of NetworkA group of computers and other devices connected together is called a networkNetworking is the concept of sharing resources and servicesWhat is a Network?Figure 1-1 What is a Local Area Network?Example a NetworkTo avoid duplication of equipment and resourcesBe cost effectiveTo communicate efficientlyTo improve managementWhy we use a Network?LAN OverviewA Local Area Network (LAN) is a group of computers and network communication devices interconnected within a geographically limited area.LAN provide companies with time and money savingLAN is simple, inexpensive, support many type of protocolsSetup a Local Area NetworkSimple ConnectionsInstalling an adapter card to connect computer on a LAN was a complicated process.The software accompanying a LAN adapter is automatically configured to allow the computer to begin communicating immediatelySetup a Local Area NetworkSimple ConnectionsThis auto-recognition and auto-configuration is called plug-and-play compatibilityWith plus-and-play, the software will ask some questions so that it can define the parameters required to get your PC communicating with other PCs on the network.Setup a Local Area NetworkLAN Supports Multiple Protocols Supports Multiple ProtocolsA protocol is method or procedure used for the exchange of information between two communications devicesMost important protocolNovell NetwareAppleTalkTCP/IPOSI protocolLAN Support New ApplicationsSupport New ApplicationsWe all use e-mail to communicate and LANs can make that process faster and easier.Many LAN support voice-mail, video conferencing, and distance learningLAN Support New ApplicationsSupport New ApplicationsNetwork Models Network categoriesServer-Based networkPeer-to-Peer networkServer-Based NetworkServer-Based NetworkA server-based network consist of a group of user-oriented PCs (call clients) that issue requests to a serverSpecialized Servers: File server, print Server, Database Servers Server-Based NetworkPeer-to-Peer NetworkA peer-to-peer network consist of a group of PCs that operate as equalEach PC is called a peer and act as a client or serverUser of each computer determines what is sharedPeer -to-Peer NetworkPeer-to-Peer NetworkPeer-to-peer NetworkWhere Peer-to-Peer is appropriate?Fewer than 10 usersSecurity is no needUser located in same general areaOrganization will have limited growth in the futureCombination NetworksInclude peer-to-peer and server based networkingServer based operating system is responsible for sharing the major applications and dataClients can run Win NT workstation, Win 95, Win 98, Win Me, Win XP... They can access resources on server and share their resources Networks ClassificationLAN: Local Area NetworkWAN: Wide Area NetworkMAN: Metropolitan Area NetworkGAN: Global Area NetworkNetworks Classification (2)Local Area NetworkNetworks Classification (3)Wide Area NetworkSummaryNetwork overviewTypes of networkLAN overviewSome advantages of LAN