Chapter 3: Network Computer ATHENA

Chapter 3: Network ComputerATHENAObjectiveWhat is a Network? Why we use a Network? Advantages of LAN Types of NetworkATHENAWhat is a Network?• A group of computers and other devices connected together is called a network • Networking is the concept of sharing resources and servicesATHENAExample a NetworkFigure 1-1 What is a Local Area Network? ATHENAWhy we use a Network?• To avoid duplication of equipment and resources • Be cost effective • To communicate efficiently • To improve managementATHENA...
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Chapter 3: Network Computer ATHENA Chapter 3: Network ComputerATHENA Objective What is a Network? Why we use a Network? Advantages of LAN Types of NetworkATHENA What is a Network? • A group of computers and other devices connected together is called a network • Networking is the concept of sharing resources and servicesATHENA Example a Network Figure 1-1 What is a Local Area Network?ATHENA Why we use a Network? • To avoid duplication of equipment and resources • Be cost effective • To communicate efficiently • To improve managementATHENA LAN Overview A 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 saving LAN is simple, inexpensive, support many type of protocolsATHENA Setup a Local Area Network Simple Connections • Installing 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 immediatelyATHENA Setup a Local Area Network Simple Connections • This auto-recognition and auto-configuration is called plug-and-play compatibility • With 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.ATHENA Setup a Local Area NetworkATHENA LAN Supports Multiple Protocols Supports Multiple Protocols • A protocol is method or procedure used for the exchange of information between two communications devices • Most important protocol – Novell Netware – AppleTalk – TCP/IP – OSI protocolATHENA LAN Support New Applications Support New Applications • We all use e-mail to communicate and LANs can make that process faster and easier. • Many LAN support voice-mail, video conferencing, and distance learningATHENA LAN Support New Applications Support New ApplicationsATHENA Network Models Network categories – Server-Based network – Peer-to-Peer networkATHENA Server-Based NetworkATHENA Server-Based Network A server-based network consist of a group of user-oriented PCs (call clients) that issue requests to a server Specialized Servers: File server, print Server, Database ServersATHENA Server-Based NetworkATHENA Peer-to-Peer Network A peer-to-peer network consist of a group of PCs that operate as equal Each PC is called a peer and act as a client or server User of each computer determines what is sharedATHENA Peer -to-Peer NetworkATHENA Peer-to-Peer NetworkATHENA Peer-to-peer Network • Where Peer-to-Peer is appropriate? – Fewer than 10 users – Security is no need – User located in same general area – Organization will have limited growth in the futureATHENA