SSU ES 465 - Local Area Network (144 pages)

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Local Area Network



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Local Area Network

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Lecture Notes


Pages:
144
School:
Sonoma State University
Course:
Es 465 - Intro to Networking/Ntwk Mgmnt

Unformatted text preview:

Local Area Network Dr Farid Farahmand Revised on 10 6 12 Data Network Areas o o o WAN Wide Area Networks MAN Metropolitan Area Networks LAN Local Area Networks n Sharing resources in small but geographically dispersed network LAN Applications o personal computer LANs n n n o Potential issues for a single LAN o o reliability capacity cost High speed office networks o o high data rate high speed interface distributed access limited distance limited number of devices backbone LANs n n interconnect low speed LANs Resolve typical drawbacks to LANs used particularly for desktop image processing o n o o o n interconnecting large systems mainframes and large storage devices printers hard drives etc o o backend networks n low cost limited data rate share resources o n o a single page with 200 pictures elements black and white is about 3 Mbits high capacity local storage LAN Backbone LAN LAN Applications o storage area networks SANs n separate network to handle storage needs o n n detaches storage tasks from specific servers shared storage facility o n n eg hard disks tape libraries CD arrays accessed using a high speed network o n shared storage eg Fibre Channel improved client server storage access direct storage to storage communication for backup Project Build a SAN Storage Area Networks LAN Topologies o Mesh Topology n n o Star Topology n n o n n All devices are connected to a central cable called the bus or backbone The bus is often terminated on both ends if not connected to any devices The bus is typically duplex Ring Topology n n o All devices are connected to a central switch hub repeater Nodes communicate across the network by passing data through the switch hub Typically has unidirectional links Bus Topology n o Devices are connected with many redundant interconnections between network nodes In a full mesh topology every node has a connection to every other node in the network Mesh All devices are connected to one another in the shape of a closed loop so that each



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