Flashcards
ICT topic 8
Cards in this deck (22)
- 1Command line drivenInterfaces where you have to type in commands in a certain language – writing small batch files in DOS.
- 2graphical user interfaceInstead of typing commands, you enter them by pointing and clicking at objects on the screen.
- 3menu driven interfaceA user is presented with a list of options and they type the letter or number of their selection.
- 4form driven interfaceInterfaces used to collect information from a user in a step by step manner. The user supplies this information by typing it into a form.
- 5natural language interfaceThis is an interface that allows the user to interact using natural written or spoken language as opposed to computer language and commands.
- 6network interface card (NIC) WHAT IT DOES-Prepares data for sending over the network
-Sends data
-Controls the flow - 7hub WHAT IT DOESis used to join computers
- 8switch-Used to join multiple computers
-Switches contain more intelligence - 9RouterHardware devices that join several wired or wireless networks together
- 103 data transfer media1.metal wires
2.fibre optic cable
3.wireless - 11types of metal wires-unshielded twisted pair
-shielded twisted pair - 12computer networkA computer network describes any situation where 2 or more computers are linked together using some form of communication media
- 132 categories of networks-Local Area Networks (LANs)
-Wide Area Networks (WANs) - 14networks advantages-Ability to share files
- Ability to share hardware resources
- Ability to share software
- Lower software costs
- Improved security
- Easier to implement acceptable use policies
- Easier to back up files
- Improved communication
- Central maintenance and support - 15network disadvantages-Technical knowledge needed
-Lack of access when file server fails
-Cost (although a network will save money over time, there is an initial cost of all the network equipment and training needed.) - 16standalone computerA stand alone environment is where each computer is used on its own without any connection to other computers
Each computer will need its own copy of the Operating System
Each computer will need its own copy of the application software. - 17standalone computer advantages-Cheaper hardware and software
-Less IT knowledge needed
-Fewer problems with viruses
-Not as hardware dependent - 18standalone computer disadvantages-Transfer of files between computers is some times necessary
-Hard to keep up to date
-Harder to install software (has to be installed on each computer)
-Harder to update software
-Backups need to be kept by each user - 19Local Area Networks (LANs)-Restricted to a small geographical area, such as a single building, site or college campus
-Connected by physical cables
also a growing use of Wireless devices
-All of the network resources are owned and managed by the organisation that uses them
E.g. Runshaw College’s LAN is used only by Runshaw staff & students - 20Wide Area Networks (WANs)-Geographically distributed, can be world-wide
-Often a collection of several linked LANs
-Connected via combination of communications media such as cables, satellite, microwave or telecommunications
-Uses resources owned and managed by a wide range of organisations
-Can be subdivided into -
Public WANs or Private WANs
Public WAN E.g. the Internet
Private WAN, secure networks owned by one organisation - 21internetA network of networks enabling people to exchange and share data.
- 22WWWSimply called the Web, is a means of accessing information on the internet.
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- Flashcards on ICT topic 8, created by lpaigestaziker on 06/01/2015.
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