Computing Networks

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Test Data
The data you use to test part of your program e.g. To test a maths quiz you might enter "24" or "4.2" normal data or "Bob" erroneous data
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Algorithms
A series of steps designed to solve a problem
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Compression
The process of reducing the physical size of some files. There are two different types Lossy - some of the quality of the original file is lost, Lossless - none of the original file quality is lost
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HTML
The computer programming language, hypertext markup language used for displaying web pages in a browser
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Router
Device that forwards data packets to the appropriate parts of a computer network
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Internet
A worldwide collection of computer networks. WWW - The world wide web is a collection of webpages found on a network of computers (internet). Your web browser uses the internet to access the web
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DNS Server
Computer within an ISP network responsible for matching up host names to IP addresses
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MAC Address
A unique number permanently assigned to every physical interface on a computer network (the serial number of the network hardware)
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Network Topology - Bus
A bus network is a network topology in which nodes are directly connected to a common linear (or branched) half-duplex link called a bus.
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Network Topology - Ring
A ring network is a network topology in which each node connects to exactly two other nodes. Data travels from node to node, with each node along the way handling every packet of data
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Network Topology - Star
This consists of a central node, to which all other nodes are connected; this central node provides a common connection point for all nodes through a hub.
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Standalone
A computer that is not connected to a network. All software is installed on the standalone computer. It doesn't share peripherals with any other computer
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Advantages and Disadvantage of Bus
Easy to install, cheap to install as it doesn't require much cable. But if the main cable fails the whole network will fail, more workstations that are connected the performance of the network will become slower because of data collisions
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Advantages and Disadvantages of Ring
Can transfer data quickly, even if there are a large number of devices connected because the data only flows in one direction, so there won't be any data collisions. But if the main cable fails or any device is faulty the whole network will fail.
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Advantages and Disadvantages of Star
Very reliable - if one cable or device fails then all the others will continue to work, higher performing as no data collisions can occur. But it is expensive to install
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TCP/IP
TCP/IP (also known as the internet protocol suite) is the set of protocols used over the internet. It organises how data packets are communicated and makes sure packets have the correct data (so they can get to their destination without a problem)
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Networks
More than one computer connected together. Share files and device (e.g. printers). Site(software) licences are likely to be cheaper than buying several standalone licences. Users can collaborate.
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Hubs
Hub - broadcasts data to all devices on a network. This can use a lot of bandwidth as it results in unnecessary data being sent - not all computers might need to receive the data.
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Switches
Switch - stores the MAC addresses of devices on a network and filters data packets to see which devices has asked for them
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Wireless Access Points
A networking hardware device that allows a Wi-Fi compliant device to connect to a wired network (part of your Wi-Fi router)
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Client Server
Network type where a computer is a server and others are peers. Server - software that provides services to a client, or the hardware that is running it. Client - software or hardware that requests services from a server
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Peer to Peer
Network type in which every computer can act as a client or server, with no central servers.
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WAN
A computer network that spans a relatively large geographical area. Typically, a WAN consists of two or more local-area networks (LAN's)
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LAN
A local area network is a computer network that interconnects computers within a limited area such as a residence, school, laboratory, or office building
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IP Adress
Unique number assigned to every computer or device connected to the internet
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Other cards in this set

Card 2

Front

A series of steps designed to solve a problem

Back

Algorithms

Card 3

Front

The process of reducing the physical size of some files. There are two different types Lossy - some of the quality of the original file is lost, Lossless - none of the original file quality is lost

Back

Preview of the back of card 3

Card 4

Front

The computer programming language, hypertext markup language used for displaying web pages in a browser

Back

Preview of the back of card 4

Card 5

Front

Device that forwards data packets to the appropriate parts of a computer network

Back

Preview of the back of card 5
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