26 terms

1.4 networks y9

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Terms in this set (...)

Network
Two (2) or more devices connected for the purposes of sharing data
Wide Area Network
The network connects computers and other resources over a large geographical area. Uses third party (e.g. BT/Virgin) infrastructure such as switches and cabling to transfer data between computers across the network e.g. the internet
Local Area Network
A network which covers a small area i.e. a single room or building
Internet
The largest WAN, available to most everyone around the world
Wi-Fi
Wireless Fidelity allows a computer to connect to the Internet without wires by use of a wireless adapter
Wi-Fi Adapter
Allows a computer or laptop to connect to a Wi-Fi signal
Network Interface Card
A piece of hardware that provides a physical connection to a network
Ethernet Cable
Used to connect a computer via the NIC to a Modem
Coaxial Cable
A shielded cable usually used with Satellite devices and/or Coaxial modems
Fiber Optic Cable
A cable used for high quality sound or transmission of high speed internet
Server
Stores and retrieves data, programs, and files for client computers... may I help you?
Client
A computer that relies on a Server for storage and retrieval of files
Router
A hardware device used to connect different networks together. They forward data packets to the correct network. They are typically used to transfer data packets between a home network and the Internet
Star Network Topology
all devices on the network connect to a central device, and this central device creates a single point of failure on the network.
Mesh Topology
every node is connected to every other node
Bus Topology
Network configuration wherein all computers connect to the network via a central bus cable.
client/server network
computer configuration in which one or more computers on the network acts as a server
Advantage - Client Server
software can be updated easily
Client Server Disadvantages
Expensive to purchase and set up. If the server goes down, the whole network goes down. Server may be overloaded with too many clients
peer-to-peer network
any network without a central file server and in which all computers in the network have access to the public files located on all other workstations
Peer to Peer Disadvantages
Difficult to keep the network updated. Causes files to be duplicated many times. Data may be lost if a computer goes down. Machines slow down when devices access them
Peer to Peer Advantages
Easy to maintain and no dependence on a central server
Wireless Advantages
mobility, no cables, less susceptible to power spikes.
Wireless Disadvantages
Range, speed and Security
Network bandwidth
The amount of data that can be transferred on a network during a specific interval; usually measured in bits per second.
Network Node
Any device physically connected in a network (such as computer workstations, server, printers, etc.)

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