- Data Transmission: A movement of data from one place to another
- Serial Data Transmission: Single Bits are sent one after another along a single wire
- Parallel Data Transmission: Multiple bits are sent down several wires simultaneously
- Baud Rate: The rate at which signals on a wire change
- Bit Rate: The number of bits transferred per second
- Bandwidth: The speed at which data is transferred measured in hertz.
- Start and Stop bits: Signal the beginning and ending of a trasmission
- Parity bit: Can be odd or even and is used for checking that a message is correct.
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- Handshaking Protocol: When two computers engaging in data transmission signal to one another they are ready to receive and transmit.
- Broadband System: When multiple channels are used for data transmission using several data streams.
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- LAN: Local Area Network - Linked computers in a small geographical area
- WAN: Wide Area Network - Linked computers over a large geographical area
- Topology: The layout of a network e.g star, bus, ring
- Standalone: A computer not connected to a network with its own peripherals
- Internet: A interlinked network or networks made up of LAN's and WAN's
- Peer to Peer Network: A network where all nodes are equal with no dedicated server
- Client: A computer that receives services from the server
- Server: A computer that provides services for the client
- SaaS: Software as a Service
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- WiFi: Wireless Fidelity, wireless networking trademarked as IEEE 802.11
- Router: A device that receives data packets and passes them on to the correct destination
- Gateway: A device which connects two networks insuring they use the correct protocol so data transmission can happen
- Dynamic Web Page: A web page which content is generated when the web browser request is received
- Inter-networking: When two LAN's are connected via a WAN to allow communication
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Two main types get used, Star and Bus.
- Bus: Can be fast if good coaxial cables are used
- Star: Fast as each workstation has its own cable
- Bus: Transmission gets slower
- Star: Constant speed maintained
- Star: Expensive to set up due to cable costs
- Bus: Cheap as theres not much cabling required
- Bus: If the main cable is effected the whole network is
- Star: If a cable is effected only the individual workstation will be effected.
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