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- 1What is a computer network?two or more computers connected together to share information
- 2Describe a LANit is a local area network.Each devise is called a node.A LAN is installed on the site.relatively small,it is owned by the organisation.
- 3Describe a WANCover a large geographical area.Use cables, telephone lines, satellite and radio waves to cannot.
- 4What are the advantages of a computer network?printers and scanners can be shared .the whole network can be backed up centrally.Messages can be sent between users ,A can share files which prevent duplication of information.
- 5What are the disadvantages of a computer network?A trained person is needed to manage the network.Wiring can be expensive to buy and install security is an issue as a virus can effect all computers.
- 6What devices are needed to produce a LAN?Router,Hardware,switch,NIC.
- 7What is the purpose of a NIC?The NICs convert the data signals from the nodes into data signals that can be transferred across the network.
- 8What is the purpose of a Router?Routers work by sending data between networks (e.g. over the internet)
- 9What is the purpose of a Hub?A device that connects
nodes together.
Not intelligent – data
is sent to all nodes
across the whole of the
network.
Cheap devices – USB hubs
useful in home computer
installations. - 10What is the purpose of a Switch?A device that connects nodes together.
An intelligent device that can sends data to the nodes that the data is intended for.
This reduces network traffic because making the network run faster. - 11What is the purpose of a WAP?In computer networking, a wireless access point (WAP), or more generally just access point (AP), is a networking hardware device that allows a Wi-Fi device to connect to a wired network.
- 12What is the difference between a Hub and a Switch?Not intelligent – data
is sent to all nodes
across the whole of the
network.
An intelligent device that can sends data to the nodes that the data is intended for. - 13What is the Internet?a global computer network providing a variety of information and communication facilities, consisting of interconnected networks using standardised communication protocols
- 14What is the World Wide Web?an information system on the Internet which allows documents to be connected to other documents by hypertext links, enabling the user to search for information by moving from one document to another.
- 15What is the purpose of a Modem?A modem converts digital signals generated by the computer into analogue signals which can be transmitted over a telephone or cable line and transforms incoming analogue signals into their digital equivalents.
- 16What is the purpose of an ISP?An Internet service provider (ISP) is an organisation that provides services accessing and using the Internet. Internet service providers may be organised in various forms, such as commercial,
- 17What is an IP address?a unique string of numbers separated by full stops that identifies each computer using the Internet Protocol to communicate over a network.
- 18What does HTTP stand for?Hypertext Transfer Protocol
- 19What is a URL?the address of a World Wide Web page.
- 20How is a URL constructed?A Uniform Resource Locator (URL), colloquially termed a web address, is a reference to a web resource that specifies its location on a computer network and a mechanism for retrieving it
- 21What are the three different network typologies?Star, Bus, and Ring
- 22What are the advantages / disadvantages of a Star topology?Disadvantages of a Star Topology. Requires more cable length than a linear topology. If the hub, switch, or concentrate fails, nodes attached are disabled. More expensive than linear bus topologies because of the cost of the hubs, etc
- 23What are the advantages / disadvantages of a Ring topology?Disadvantages of ring topology. All data being transferred over the network must pass through each workstation on the network, which can make it slower than a star topology.
- 24What are the advantages / disadvantages of a Bus topology?Disadvantages of a Linear Bus Topology. Entire network shuts down if there is a break in the main cable. ... Difficult to identify the problem if the entire network shuts down.
- 25List examples of data that need to be kept securepasswords,bank accounts.
- 26What is encryptionthe process of converting information or data into a code, especially to prevent unauthorized access.
- 27What is decryption?Decryption is the process of transforming data that has been rendered unreadable through encryption back to its unencrypted form.
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- Fichas sobre Sin título, creado por Sohail Hussain el 01/12/2017.
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- Sohail Hussain
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