BO63 UNIT 1

BO63 UNIT 1

1. Unit 1

   • Lan
     • Local Area Network
       • Operates over a small area, such as buildings or group of buildings
   • Networking Hardware
     • Server
       • File Server- to store and provide files used by one server
         • Web Server- uploads and distributes web pages with their linked files to the Internet
           • Database Server- provides database services to other computer users and programs
     • Backup Storage
       • Backing up data is essential to maintain security of data.
         • Stored on
           • Magnetic disk
             • Removable device
               • 'cloud' storage
     • Firewall
       • Protects from intrusion, all data that passes to the firewall is checked to match a certain set of rules, if they do not meet the rule requirements they are blocked acces
     • Printers
       • Black and white or colour, dependent on output required. Connected via network so that everyone can use the printer
     • Network Infrastrcuture
       • Ethernet cabling and fibre-optic cabling
   • Communication Devices
     • Network interfacecard (NIC)
       • Connected to motherboard, has an Ethernet input
     • Hub
       • Connecting many Ethernet-cable-type-devices, several ports which these devices are connected and the data recieved is sent out again to all other ports except input
     • Switch
       • Similar role to hubs, but data transfer is more efficient than hub as data is transferred to destination line output rather than every line.
     • Wi-Fi router
       • Wireless access point, provides network access withing the theatre for a range of Wi-Fi devices, tablets, smartphones and laptop computers
   • Point-Of-Sale
     • system is used to help the retailer complete sales transactions, including taking payments from customers
     • Hardware
       • Barcode Scanner
       • Chip-and-PIN-type cards readers
       • Customer displays
       • Keyboards and touchscreen for data entry
       • Printers for customer reciepts
       • An EPOS processor unit