Answers [Internet and Services]

Chapter 2

Internet & Services

1)     What is internet?
Ans: Internet is an interconnection of several thousands of computers of different types belonging to the various networks all over the world.

2)     Who controls the Internet?
Ans: Different organization like ISOC (Internet Society), W3C (World Wide Web Consortium), IAB (Internet Architecture Board), IEFT (Internet Engineering Task Force), IRTF (Internet Research Task Force), IESG (Internet Engineering Steering Group) and INIC (Internet Network information Centre) gives directive and guideline for the proper use of internet.

3)     Why is internet called ‘network of networks’.

Ans: The internet is called ‘network of networks’ because all the smaller networks of organizations are linked together into the one giant network called the internet.

4)     Which communication protocol is used by the internet?

Ans: TCP/IP is the communication protocol used by the internet.

5)     List the components required for internet connection.
Ans: The components for internet connect are:
i) A TCP/IP enabled computer with web browser
ii) An account with an ISP
iii) MODEM
iv) Connection (ISDN, Satellite, cable and dial-up)

6)     List the services provided by internet.
Ans: The services provided by internet are:
i) WWW (World Wide Web)
ii) E-mail (Electronic mail)
iii) FTP (File Transfer Protocol)
iv) IRC (internet Relay Chat)
v) News Group
vi) Telnet
vii) Internet Telephony
viii) E-commerce

7)     What is E-mail?
Ans: E-mail (Electronic mail) is one of the most popular services provided by the internet which exchanges messages between the computers.
It is the method of transferring/transmitting data, text, file, digital photo or audio or video file from one computer to another computer over the internet.

8)     Write down the advantages of E-mail.
Ans: The advantages of email are:
i) It allows to send and receive message across the world at very low cost.
ii) It is very fast compared to postal system.
iii) The image, sound, video and documents can be attached to e-mail message.
iv) Multiple copies of same message can be sent to many people.

9)     Write down the disadvantages of e-mail.
Ans: The disadvantages of e-mail are:
i) Minor mistakes in e-mail address may deliver the mail to wrong address.
ii) Since it passes through a vast electronic network, it may be seized in between.

10)  What is newsgroup?
Ans: A newsgroup is a discussion group that discuss on particular topic such as politics, health, computer, etc.

11)  What is telnet?
Ans: A telnet is a program that allows a user to log in to a remote computer on internet as a user on that system.

12)  What is FTP?
Ans: It is the internet tool that allows the user to transfer the file from one computer to another.

13)  What is IRC?
Ans: Internet Relay Chat is one of the important services provided by the internet which allows the user to communicate with other people in real time.

14)  What is internet telephony?
Ans: It is one of the cheapest and reliable services provided by the internet that allows the user to make telephone communication or voice communication through internet.

15)  What is FAQ?

Ans: FAQ (Frequently Asked Questions) is an online document that possesses series of common questions and answers on a specific topic.

16)  What is E-commerce?
Ans: It is the buying and selling of goods over the internet.

17)  What is video conferencing?
Ans: Video conferencing is the visual communication of parties around the world.

18)  What do you mean by online banking?

Ans: Online banking is the practise of making transaction using the internet.

19)  What is webpage?
Ans: Webpage is an electronic document written using a computer language called HTML.

20)  What is website?
Ans: It is a collection of webpages that can be published by an organization or individual.

21)  What is uploading?
Ans: Uploading refers to copying files or documents, programs or data from the user computer to the internet server.

22)  What is downloading?
Ans: Downloading refers to the copying files or document or program or data from the internet server to the user computer.

23)  What is web browser?
Ans: Web browser is a computer program that access web pages and displays them on the user computer.

24)  What is URL?
Ans: It is a unique address that provides location of a webpage on the internet.

25)  What is browsing/ surfing?
Ans: Browsing/ Surfing means searching information on the internet.

26)  What is search engine?
Ans: Search engine is the website that allows the user to search the information based on keywords on combination of keywords. They are used to locate specific sites and information.

27)  What is URL?

Ans: Each web page has a unique address that provides location on the internet is known as URL (Uniform Resource Locator).

28)  What is a blog?

Ans: A blog is a time-stamped online journal that appears on a website.

29)    What is wi-fi?

        Ans: Wi-fi refers to wireless technology that allows computer and other devices to communicate over 

         wireless signal.    

                                                                                                                                    

30)  Write down the name of any four web browsers.
Ans: Any four web browser are:
i) Google chrome            ii) Mozilla Firefox  iii) Opera                iv) Internet explorer

31)  List down the types of modulation.
Ans: The types of modulation are
i) Amplitude Modulation (AM)
ii) Frequency Modulation (FM)
iii) Phase Modulation (PM)

32)  Write down the names of four ISPs of Nepal.
Ans: The names of four ISPs of Nepal are:
i) World Link
ii) Broad Link
iii) Mercantile
iv) Otel

33)  What is ISP?
Ans: It is a company that provides Internet and E-mail service.

34)  What is ISDN?
Ans: It is a high speed digital communication network involving from existing telephony integrated digital network (IDN) which provides end to end digital connectivity to support a wide range of services including voice and non-voice service.

35)  Write down the names of any four search engine.

Ans: Names of any four search engine are:

·         www.google.com

·         www.yahoo.com

·         www.bing.com

·         www.ask.com

36)    Write down the names of any four sites which provides e-mail services.

Ans: Names of any four sites that provides e-mail services are:

·         www.yahoomail.com

·         www.hotmail.com

·         www.gmail.com

·         www.outlook.com

37)What is intranet?

Ans: An intranet is a private computer network that uses the internet protocol to securely share any part of information of an organization.

38)What is extranet?

Ans: An extranet is a computer network that allows controlled access from outside for specific business or educational purposes.

39) Discuss in short how email works.

      Ans: The e-mail uses two main protocols :POP and SMTP. When an e-mail is sent by a person using e-mail program the e-mail directly reaches to the concerned electronic mail box and the recipient gets the message when he/she checks in the mailbox. In this way,  e-mail works.

40) Explain in short the history of the internet.

    Ans:The internet originated from an experimental network called ARPANET created in 1969 by

    the US Department of DARPA. Later it changed to DARPANET. In the mid 1980,the DOD

    stopped funding after whose NSF joined ARPANET. The NSF developed another network

    called NSFNET which linked five regional areas and allowed researchers across the US to

    access data. Meanwhile, other several networks were developed by different organizations and

    by 1955the internet was opened for general public. In this way internet evolved.

41) How does internet work?

       Ans: At the source computer, the message or the file to be sent is firstly divided into very small

       parts called packets. Each packet is given a number serial wise e.g. 1,2,3. All these packets are

       then sent to the address of destination in random manner. If a packet is garbled or lost, it is

       demanded again. The packets are reassembled in the order of their number and the original

      message/file is obtained. In this way, internet works.

42) What are social networking websites? Give examples

      Ans: Social networking websites are online communities in which member interact. For eg:

     www.facebook.com, www.myspace.com.

43) Why is video conferencing popular in the field of business?

      Ans: Video conferencing is popular in the field of business because it allows meeting or conferences to be held without the need for all participants to travel to a single location which saves time and money.

44)What are the main objectives of  FTP?

      Ans: The main objectives of FTP are:

i)     To promote sharing of files.

ii)    To encourage indirect or implicit use of remote computers.

iii)  To shield a user from variation in file storage systems among hosts.

iv)  To transfer data reliably and efficiently.

v)    

45) What is E-fax?

     Ans: E-fax is the service of the internet through which a user can send and receive faxes(documents or graphics) directly from a computer to another computer.

46) What is WWW?

      Ans: WWW is a popular service of internet which provides information on various topics. 

47)   What is domain name system?

      Ans:  The name/address given to a single website or a computer which uniquely identifies the resource is called Domain Name System.

48)  What are the advantages of www?

      Ans:  The advantages of WWW are:

i)     The fastest medium for transferring data.

ii)    Easier to access information from millions of websites using search engines.

iii)  A link in web document can be used to open other documents.

iv)  Allow user to interact with applications through dialog boxes and forms.

49)  What is web chat?

      Ans: Web chat is one of the services of the internet which enables you to communicate with each others in real-time through text messages.

50) What is HTTP?

      Ans: HTTP is a protocol used by the WWW to establish client and server interactions.

51) What are the devices which are essential for video conferencing?

      Ans:  The devices which are essential for video conferencing are:

               i)Webcam

               ii)Microphone

52) What are the advantages of internet?

       Ans:   The advantages of internet are:

i)    Communication medium

ii)   Information sharing

iii) Entertainment

iv) Online services

54) What are the disadvantages of internet?

       Ans: The disadvantages of internet are:

i)   Theft of personal information

ii)  Spamming

iii)  Pornography

iv)  Limited personal interaction

55) What are the uses of e-mail?

      Ans:  The uses of e-mail are:

i)      Information exchange

ii)     Group work

iii)   Record keeping

iv)   Staying in touch

56) What are the types of e-commerce?

     Ans: The types of e-commerce are:

i)        Business-to-Business(B2B)

ii)       Business-to-Consumer(B2C)

iii)     Business-to-Employee(B2E)

iv)     Business-to-Government(B2G)

v)      Government-to-Business(G2B)

57) What is e-learning? What are its types?

      Ans: The process of teaching and learning conducted electronically is called e-learning. Its types

              are:

i)    Computer based training(CBT)

ii)   Internet based training(IBT)

iii) Web based training(WBT)

iv) Distance learning

v)  Online universities

vi) K-12 learning     

         

58) What is the advantage of knowing URL?

      Ans:

59) How can you login your computer from distance?

     Ans:We can login our computer from distance by the use of telnet.

60)What is proxy server?

    Ans:

61) What is a link?

     Ans: Links are quick routes to the other web pages that may be similar or related in some fashion.

62) What is internet roaming?

     Ans: Internet roaming is a service which gives the internet subscriber the ability of use of an internet account anywhere in the world by dialing into a local network and avoiding costly long distance or international calls.

63) What are the advantages of chat?

    Ans: The advantages of chat are:

i) It is very fast way of communication.

ii) It can be accessed at any time (24 hours).

iii)  It is possible to do long distance communication.

iv)  It is also possible to do video or audio chatting.

64) Differentiate between video conference and chatting.

      Ans:The differences between video conference and chatting are:

          

Video conference	Chatting
It is a service that provides visual communication of parties around the world.	It is a service used to make communication by reading, ignoring and replying the message.
It requires necessary hardware and software to see and speak to each other.	It uses the browser software without using special chat software.
It communicates sounds as well as pictures.	It communicates only text.
For eg: chatting on skype.	For eg: chatting on facebook.

65) Differentiate between web page and web browser.

       Ans:The differences between web page and web browser are:

        

Web page	Web browser
Web page is a page that is stored in a web server that hosts the web sites.	Web browser is a program that displays pages of web sites on the user computer.
It contains information about any person or organization.	It allows to retrieve, view and copy information using internet.

66) Differentiate between e-mail and fax.

     Ans:The differences between e-mail and fax are:

           

E-mail	E-fax
It is a service of internet that allows sending and receiving mails.	It is a service of internet that allows sendind and receiving faxes directly on computer.
E-mail can be sent using a computer with modem, e-mail program and internet facility.	E-fax can be sent using a computer with modem, e-fax program and internet facility.
It is the soft copy service of the internet.	It is the hard copy service of the internet.

67) Differentiate between internet and intranet.

     Ans:The differences between internet and intranet are:

          

Internet	Intranet
It is not owned by a single company or organization.	It is owned by a single organization or company.
It can be used by people all over the world.	It can only be used by the employees of the owned organization.

68) Differentiate between chat and e-mail.

      Ans:The differences between chat and e-mail are:

              

Chat	E-mail
It enables us to send and receive instant messages.	It doesn’t enable us to receive and send instant messages.
To use chat services, we should have a chat program like Yahoo Messenger, etc.	To use e-mail service, we should have email program like Microsoft Outlook, Euroda etc.
It can be done only when both sender and receiver are physically present on the line.	It can be done even when the both sender and receiver are not present physically on the line.