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Flashcards

Networks

Maleekah Mahmood Inglês 27 flashcards

Flashcards do conjunto (27)

  1. 1what is a computer network?a computer network is 2 or more computers connected together to share information
  2. 2describe a LANA LAN is a big area,local network to a connected set of computers
  3. 3describe a WANaWAN is installed on one site,relatively small it is owed by the organism .
  4. 4What are the advantages of a computer network?you can change your password.
    Sharing devices such as printers saves money.
    Site (software) licences are likely to be cheaper than buying several .
  5. 5What are the disadvantages of a computer network?Purchasing the network cabling and file servers can be expensive.
    Managing a large network is complicated, requires training and a network manager usually needs to be employed.
    If the file server breaks down the files on the file server become inaccessible.
  6. 6What devices are needed to produce a LAN?network interface card
    router
    switch
    hub
    wireless access point
    cables
  7. 7What is the purpose of a NIC?The NIC contains the electronic circuitry required to communicate using a wired connection.
  8. 8What is the purpose of a Router?he main purpose of a router is to connect multiple networks and forward packets destined either for its own networks or other networks.
  9. 9What is the purpose of a Hub?A hub, also called a network hub, is a common connection point for devices in a network. Hubs are devices commonly used to connect segments of a LAN. The hub contains multiple ports.
  10. 10What is the purpose of a Switch?The basic function that any switch is supposed to perform is to receive information from any source connected to it and dispatch that information to the appropriate destination only.
  11. 11What is the purpose of a WAP?A wireless access point (WAP) is a hardware device or configured node on a local area network (LAN) that allows wireless capable devices and wired networks to connect through a wireless standard, including Wi-Fi or Bluetooth.
  12. 12What is the difference between a Hub and a Switch?Function of a switch vs. a hub. A switch is used to connect various network segments. A network switch is a small hardware device that joins multiple computers together within one local area network (LAN). A Hub connects multiple Ethernet devices together, making them act as a single segment.
  13. 13What is the Internet?a global computer network providing a variety of information and communication facilities, consisting of interconnected networks using standardized communication protocols.
  14. 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.
  15. 15What is the purpose of a Modem?Modem stands for MOdulator/DEModulator. A modem converts digital signals generated by the computer into analog signals which can be transmitted over a telephone or cable line and transforms incoming analog signals into their digital equivalents.
  16. 16What is the purpose of an ISP?An Internet service provider (ISP) is an organization that provides services accessing and using the Internet. Internet service providers may be organized in various forms, such as commercial, community-owned, non-profit, or otherwise privately owned.
  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, and instead of acting as its own application layer protocol, it uses separate protocols called SSL (Secure Sockets Layer) and TLS (Transport Layer Security).
  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. The first part is the protocol, which tells the web browser what sort of server it will be talking to in order to fetch the URL. In this example, the protocol is http.
  21. 21What are the three different network topologies?Star Topology
    Bus Topology
    Ring Topology
  22. 22What are the advantages / disadvantages of a Star topology?Advantages of Star Topology
    1) As compared to Bus topology it gives far much better performance, signals don’t necessarily get transmitted to all the workstations.
    Disadvantages of Star Topology
    1) Too much dependency on central device has its own drawbacks. If it fails whole network goes down.
  23. 23What are the advantages / disadvantages of a Ring topology?Advantages of ring topology
    All data flows in one direction, reducing the chance of packet collisions.
    Disadvantages
    All data being transferred over the network must pass through each workstation on the network, which can make it slower than a star topology.
  24. 24What are the advantages / disadvantages of a Bus topology?Advantages of bus topology
    It works well when you have a small network.
    Disadvantages
    Difficult to identify the problems if the whole network goes down.
  25. 25What 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.
  26. 26What is encryption?the process of converting information or data into a code, especially to prevent unauthorized access.
  27. 27What is decryption?to decode or decipher.

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FlashCards sobre Networks, criado por Maleekah Mahmood em 23-11-2017.
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