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Untitled

Rohan Jamili English 31 cards

Cards in this deck (31)

  1. 1What is a computer network?A series of computers connected together.
  2. 2Describe a LANA LAN is a Local Area Network over a small geographical area e.g. a school network
  3. 3Describe a WANA WAN is a Wide Area Network over a large geographical area. The World Wide Web is a WAN we use on a daily basis.
  4. 4What are the advantages of a computer network?Resource sharing, cost efficient.
  5. 5What are the disadvantages of a computer network?Files can be intercepted, security problems.
  6. 6What devices are needed to produce a LAN?A broadband connection, a router,
    a modem (if there isn't one built in to your router).
  7. 7What is the purpose of a NIC?A Network Interface Card is used to allow a computer to connect to a network. It is usually a circuit board.
  8. 8What is the purpose of a Router?A router is a switching device for networks, which is able to route network packets, based on their addresses, to other networks or devices.
  9. 9What is the purpose of a Hub?Hubs are devices commonly used to connect segments of a LAN. The hub contains multiple ports.
  10. 10What is the purpose of a Switch?A switch can be used to connect multiple hosts (PCs) to the network. Unlike a hub, a switch forwards a message to a specific host.
  11. 11What is the purpose of a WAP?A Wireless Access Point is a networking hardware device that allows other Wi-Fi devices to connect to a wired network.
  12. 12What is the purpose of a web browser?A web browser, or simply "browser," is an application used to access and view websites.
  13. 13What is the difference between a Hub and a Switch?A hub connects things physically whereas a switch connects things through data links.
  14. 14What is the Internet?The internet is a global network of networks.
  15. 15What is the World Wide Web?The World Wide Web is the part of the Internet that contains websites and web pages.
  16. 16What is the purpose of an ISP?An Internet Service Provider is a company (BT e.t.c.) that provides Internet access to companies, families, and even mobile users.
  17. 17What is an IP address?An Internet Protocol address is a set of logical numbers which computers use to locate different websites.
  18. 18What is a URL?A Uniform Resource Locator is a set of words used by humans as it is easier to remember.
  19. 19How is a URL constructed?A URL is constructed using a protocol, a domain name and a path.
  20. 20Explain the role of the DNS.The Domain Name Service switches the URL typed by humans Into an IP address so that the computers can understand.
  21. 21What are the three different network topologies?The three different network topologies are Bus Topology, Ring Topology and Star Topology.
  22. 22What are the advantages of a Star topology?Advantages:
    It is very reliable - if one cable or device fails then all the others will continue to work
    It is fast and efficient as not data collisions can occur
  23. 23What are the disadvantages of a Star topology?Disadvantages:
    It is expensive to install
    Extra hardware is required
    If a hub/switch fails then all the devices connected to it will have no connection
  24. 24What are the advantages of a Ring topology?Advantages:
    Fast - no data collisions
    Cheap - no additional hardware needed
  25. 25What are the disadvantages of a Ring topology?Disadvantages:
    Unreliable - if one computer goes down, it affects all others on the ring
  26. 26What are the advantages of a Bus topology?Advantages:
    Easy installation
    Cheap - single cable
    Easy to add / remove devices
  27. 27What are the disadvantages of a Bus topology?Disadvantages:
    Unreliable
    Slow speed - increased traffic
    Security - risk of interception
  28. 28List examples of data that need to be kept secure.Files
  29. 29What is a Pigpen Cipher?The pigpen cipher is a geometric simple substitution cipher, which exchanges letters for symbols which are fragments of a grid.
  30. 30What is encryption?Encryption is turning plain text into cipher text, making harder for people to access to data
  31. 31What is decryption?Decryption is when you use a key to decipher cipher text and read it as plain text.

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Flashcards on Untitled, created by Rohan Jamili on 09/03/2020.
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Rohan Jamili
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