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Networks, Bus, human computer interface, lan and wan, Advantages,…

- - - - share data/files
        
        easier for internal communication/can send email
        
        centralised backup
        
        easier to monitor network activity
        
        centralised maintenance(manage network from one location)
        
        can access data from any computer
- - - - Hackers can gain access more easily
        
        If the server is down, all workstations on the network are affected
        
        Initial cost of servers, communication devices can be expensive
- - - - .As the packets arrive at each computer system, it checks the destination address contained in a packet to see if it matches its own
        
        .if the address does not match, the computer system ignores the packet. If the address of the computer system matches that contained in the packet, it processes the data
- - - - touch sensitive interface
- - - - . low sicurity - all computers on the bus can see
        all data transmissions
        
        .proper termination is required
        
        . data collisions are more likely , which causes the network to slow down. A collision is when two computers try to send a packet at the same time
        
        1 more item...
- - - - .because nodes are wired together, to add another you must shut down the network
- - - - .failure of workstation will have no affect on the network
        
        minimal network collisions
        
        Better sicurity
- - - - . Switch compares to stored list of addresses on network
        
        .Switch forwards packets to computer D's address