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Computer Science -> Solved Exercise -> Class - 8th, Lesson No. 2 (Internet Fundamentals)



4) Long Answer Type Questions: -
  1. What is MODEM? Also explain its types and speed .
  2. Answer:- MODEM stands for Modulator-Demodulator. It is a device that enables a computer to transmit data over the telephone or cable lines.
    Modem is of two types: External and Internal.
    1. External Modem: It is linked to computer externally with cables.
    2. Internal Modem: It is fitted inside the computer.
    Modem speeds are variable and typically measured in bits per second (bps). Slow modem takes more time to send or receive data. Generally a modem with 28.8 kbps speed is used. For dial-up modems, due to the technology used to deliver normal phone service, the fastest rate available is 56 kbps.
  3. Explain the facilities provided by the Internet.
  4. Answer:- Internet provides us many facilities. Some of them are as follows: -
    • News and Information: We can read newspapers online and get all kinds of information such as politics, sports etc.
    • Art and Entertainment: It provides us a lot of material for art and entertainment such as games, songs, movies, stories etc.
    • Online Shopping:We can purchase anything online from home using online shopping.
    • Mailing Letters: Using E-Mail, we can send and receive messages from all over the world.
    • Tourism and Travel: It provides facility for online booking of hotels, railway tickets, air tickets etc.
    • Chatting: We can instantly send and receive text messages anywhere in the world.
    • Banking operations: Now all banking operations can be done right from our home using E-banking services.
    • Video Conferencing: It helps us to have face to face video conversation with two or more persons at the same time.
  5. What is E-mail? Write the advantages of using email.
  6. Answer:- E-mail stands for Electronic Mail. It is a facility on internet to send and receive messages to any part of the world.
    Advantages of Email are as follows: -
    • Cost: Cost given for use of internet is the only money given. User need not to give money for postal stamps. It is cheaper than fax.
    • Speed: Its speed is greater than postal transmission. E-mail message can reach its destination with that within no time. We can correspond any times in a day.
    • Convenience: Computer user can type the message in his computer and send e-mail at any time of his convenience. It saves paper, postal cost and any other problem.
  7. Write a note on World Wide Web.
  8. Answer:- World Wide Web or WWW, also know as web, is a collection of information which is assessed via the internet. It consists of all the public websites connected to the internet including e-mail, news groups, mailing lists etc. The websites are identified by short, unique, global identifiers called URLs such as https://www.smartstudies.in. To access the information stored on the WWW we use web browser such as Google Chrome, Internet Explorer, Mozilla Firefox etc.
  9. What are the main services provided by Internet? Explain briefly.
  10. Answer:- The main services provided by Internet are as follows:-
    1. World Wide Web:- WWW is a collection of information in the form of websites which are accessed via Internet using web browsers like Google Chrome, Internet Explorer etc.
    2. E-Mail:- It is the fastest way to send and receive messages over Internet to any part of the world.
    3. E-Commerce:- The ability to do business without the user constraints of time and distance make E-Commerce one of the most important services provided by the Internet.
    4. Social Networking Sites:- These websites function like an online community of Internet users where every user has a unique profile and can invite each other to join them. Examples include Facebook, Twitter etc.
    5. Video Conferencing: - In this, users can have face to face conversation with the help of video cameras connected to two or more computers.
    6. Chatting:- It is an online conversation in which users can instantly send text messages to each other.
    7. Web Searching:- It is the process of searching specific information over internet with the help of search engines.

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