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:
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:
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. |
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