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Mason Brewis Inglés 28 fichas

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  1. 1What is a computer network?Two or more computers connected together to share information and resources .
  2. 2Describe a LANA lan is a local area network, it is installed on one site.
  3. 3Describe a WANA wan is a wide area network, uses cables, telephone lines, satellites and radio waves to connect.
  4. 4What are the advantages of a computer network?Messages can be sent between users. Users can share files which prevents duplication of information.
  5. 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.
  6. 6What devices are needed to produce a LAN?Cable connectors, power supply, hub, switch, router and network software.
  7. 7What is the purpose of a NIC?The NIC convert data signals from the nodes into data signals that can be transferred across the network.
  8. 8What is the purpose of a Router?Routers work by sending data between networks over the internet.
  9. 9What is the purpose of a Hub?A device that connects nodes together. A hub is a common connection point for devices in a network.
  10. 10What is the purpose of a Switch?A device that connects nodes together. It sends data to the nodes that the data is intended for.
  11. 11What is the purpose of a WAP?A wireless access point is a hardware device on a local area network. The wireless access point usually connects to a router as a standalone device.
  12. 12What is the difference between a Hub and a Switch?A hub is a common connection point for devices in a network but a switch sends data to the nodes that the data is intended for.
  13. 13What is the Internet?The internet is a huge network of computers all connected together.
  14. 14What is the World Wide Web?The world wide web is a collection of webpages found on the network of computers.
  15. 15What is the purpose of a Modem?A modem is a device that provides access to the Internet. The modem connects to your ISP, which typically provides either cable or DSL Internet service.
  16. 16What is the purpose of an ISP?It provides services accessing and using the internet. The ISP may be organized in various forms such as commercial , non-profit and lots more.
  17. 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.
  18. 18What does HTTP stand for?HTTPS stands for Hypertext Transfer Protocol Secure.
  19. 19What is a URL?The address of a World Wide Web page.
  20. 20How is a URL constructed?A URL can be thought of as the address of a web page and is sometimes referred to informally as a web address. A URL is made up of several parts.
  21. 21What are the three different network topologies?The Bus network, The Ring network, The Star network.
  22. 22What are the advantages / disadvantages of a Star topology?Fastest performance.
    Easy to install and to expand with extra nodes.//Uses the most cable which makes it more expensive.
    An extra hub or switch further increases the cost.
  23. 23What are the advantages / disadvantages of a Ring topology?One-way system so not affected by heavy traffic.//Cable failure anywhere will affect the whole network.
  24. 24What are the advantages / disadvantages of a Bus topology?The simplest and cheapest to install and extend.//If the main bus cable fails then the whole network will fail.
  25. 25List examples of data that need to be kept secure?Passwords, credit card numbers, personal information, your address, family details, salary, where you work.
  26. 26What is HTTPS and what is it used for?HTTP is the underlying protocol used by the World Wide Web and this protocol defines how messages are formatted and transmitted, and what actions Web servers and browsers should take in response to various commands.
  27. 27What is encryption?The process of converting information or data into a code, especially to prevent unauthorized access.
  28. 28What 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 Revision, creado por Mason Brewis el 15/12/2017.
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Mason Brewis
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