CST8174_Lecture_23_Network_primer

CST8174_Lecture_23_Network_primer - Algonquin College...

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Algonquin College CST8174 CST8174 Computer Technology Basics Network Primer
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Wednesday, May 6, 200 1 - 2 Algonquin College CST8174 Network Primer Network Topology The physical connections between individual systems, or nodes, in a network LAN Local Area Network Small geographic scale network, usually relatively small number of nodes WAN Wide Area Network Network spread over larger geographic area, with more nodes, typically, than a LAN
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Wednesday, May 6, 200 1 - 3 Algonquin College CST8174 Network Primer Medium Can be cable or wireless, the medium is responsible for the actual data transfer Protocol Set of rules, formats, actions and messages used to communicate between systems in a network Node Any single component in a network
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Wednesday, May 6, 200 1 - 4 Algonquin College CST8174 LAN Concepts Original concept of Local Area Network Primarily pioneered by Microsoft and Novell, among others Distributed the intelligence of a mainframe over multiple smaller computers Allows for the sharing of multiple resources Data Peripherals (Printers, disks, tapes) Software
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Wednesday, May 6, 200 1 - 5 Algonquin College CST8174 Network Topology Topology refers to physical layout including computers, cables, and other resources Determines how components communicate with each other Physical topology refers to arrangement of cabling Logical topology refers to how data travels between computers on the network Network may use one physical topology but a different logical topology to pass data
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Wednesday, May 6, 200 1 - 6 Algonquin College CST8174 Standard Topologies Today’s network designs are based on three topologies: Bus Consists of series of computers connected along a single cable segment Star Connects computers via central connection point or hub Ring Connects computers to form a loop
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Wednesday, May 6, 200 1 - 7 Algonquin College CST8174 Bus Topology Simplest topology for implementation All components connect via backbone or single cable segment Major weakness is single cable break can halt entire network Each segment must be terminated otherwise signal bounce occurs
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Wednesday, May 6, 200 1 - 8 Algonquin College CST8174 Bus Topology Typical bus topology diagram
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1 - 9 Algonquin College CST8174 Bus Communications In bus topology, only one computer can send information at a time Network performance slows as more computers are placed on the bus The more computers needing to send data the longer each must wait for their turn Bus is a passive topology
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CST8174_Lecture_23_Network_primer - Algonquin College...

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