Network

Network

1. topographies

   • star
   • bus
   • ring
   • mesh
     • circuit switching
       • a path is established and then locked until the end of the communication
     • packet switching
       • the data is first split up into chunks and each is sent across the pathes independently and then later reassembled
     • routing
       • the shortest paths are calulated by ruoting algorithms
       • a cost is asigned to each connection

2. advantages

   • allows computers to share files and other data
   • share resources(printers and internet connection)
   • the same username and password for every computer

3. disadvantages

   • it is very expensive
   • it requires maintenance
   • it is only as strong as its weakest connection(easier to hack than an individual device)

4. types of network

   • LAN
     • A network that is contained in an area or organisation that ins't very widespread
   • WAN
     • A wide area network is a collection of LANs spread across multiple sites

5. hardware

   • switch
     • routes packets round a network to the device its addressed to
   • hub
     • routes packets round a network blindly to all devices
   • router
     • Router stores the addresses of computers on its networks and transfers their data to devices on other networks
   • WAP
     • wireless access point allows devices to join the network it makes
   • NIC
     • Network interface car is a device that joins the network and connects to a computer or other device
   • bridge
     • gateway two networks of different types
   • gateway
     • connects two networks of the same type

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