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Chapter 4
Jacinta Rivera, Fatima Vaca Guzman and Jacinta Varela Roberts…
Chapter 4
Jacinta Rivera, Fatima Vaca Guzman and Jacinta Varela Roberts
Network Concepts
Definition
Electronic devices, connected together to exchange data.
Disadvantages
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If the network breaks, many tasks become very difficult
Advantages
Easily share files, resources and data
Store data centrally, acces and back-up
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Network devices
Hubs
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Receives a message, it sends it to every computer on the network
Switches
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Receives a message, it checks the address and sends it to that specific computer.
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Proxy Server
Share a resource, mostly internet connection
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Types of network
WLAN
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difficult to make secure, need a password to connect
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WAN
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spread over large areas, links between computers are over long distances
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Network Topologies
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Star
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Fast, expensive and the most common
Centre of network use
Switch, fast but expensive
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Ring
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Can cope with a break, computers are still joined together as a bus
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Intranet, Internet and Extranet
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Intranet
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Concept
Private network, only for users of the intranet