Answer: The Internet is a global network of billions of computers and other electronic devices.
Question 3. Write two advantages of using Internet.
Answer: Advantages of using Internet are as follows:
1. It is used for communication, entertainment, searching information and for providing many types of services.
2. It provides the facility of E-mail.
Question 5. Write the name of any two Internet Service Provider(ISP) in India.
Answer: MTNL and Airtel.
Question 15. Write the Web extensions (top level domain names) given to a Websites of the following types of organisations.
1. educational
2. government
Answer:
1. .edu
2. .gov
Question 16. Write Web extensions given to sites of the following types of organisations.
1. network organisation
2. government agencies
Answer:
1. .net
2. .gov
Question 18. Identify Web addresses and E-mail addresses from the following
1. www.scrapbook.com
2. aba@scrapbook.com
3. www.countrywide.co.in
4. 123@hotshot.co.in
Answer:
1. 1,3 are Web address
2. 2,4 are E-mail address
Question 19. Expand the following Web extensions using with Web addresses.
1. .org
2. .in
Answer:
1. Organisation
2. India
Question 21. Identify Web addresses and E-mail addresses from the following
1. www.kool.com
2. Raga100@rediffmail.com
3. www.hotspider.co.in
4. 123hotshot@elixir.co.in
Answer:
1. and
2. Web address
3. and
4. E-mail address
Long Answer Type Questions
Question 1. How did the Internet begin?
Answer: The Internet has gained popularity and emerged as an important and efficient means of communication. The term Internet is derived from the words ‘interconnection’ and ‘networks’. A network is a collection of two or more computers, which are connected together to share information and resources. The Internet is a worldwide system of computer networks, i.e. network of networks. Through Internet, computers become able to exchange information with each other and find diverse perspective on issues from a global audience. Most of the people uses Internet for sending and receiving E-mail and net surfing for retrieving information.
1. Internet is a Wide Area Network (WAN), while Intranet is a Local Area Network (LAN).
2. Greater amount of information is available on Internet, while on Intranet specific amount of information is available.
3. Internet is not safe as Intranet can be safely privatised as per the need.
1. Cyber frauds
2. Information misuse
3. Computer virus circulation
1. Allows organisations to advertise their products.
2. Provides information.
3. Easily communicate with other people.
4. Save paper as we can publish documents on the Internet.
Question 5. What is MODEM?
Answer: MODEM stands for Modulator / DEModulator. It is a hardware device that enables a computer to send and receive information over telephone lines by converting the digital data used by your computer into an analog signal used on telephone lines and the converting back once received on the other end.
The two advantages of home page are as follows:
1. It helps viewers to find out what they can find on that site.
2. Publicity of an individual or community.
1. IP addresses are unique.
2. IP addresses are global and standardised.
1. E-mail address is a network address whereas Web address is the Internet address.
2. An E-mail address always contains the ‘at the rate’ sign (@) whereas, a Web address never does.
Long Answer Type Questions [5 Marks each]
Very Long Answer type questions
● Internet is called ‘Network of Networks’ because it is global network of computers that are linked together by cables and telephone lines making communication possible among them. It can be defined as a global network over a million of smaller heterogeneous computer networks.
● The network which consists of thousands of networks spanning the entire globe is known as Internet.
● The Internet is a world wide collection of networked computers, which are able to exchange information with each other very quickly.
● Mostly people use the Internet in two ways, E-mail and World Wide Web. In Internet, most computers are not connected directly, they are connected to smaller networks, which in turn are connected through gateways to the Internet backbone.
● A gateway is a device that connects dissimilar networks. A backbone is central interconnecting structure that connects one or more networks.
● It translates meaningful domain names into the numerical IP addresses, which is needed for the purpose of locating computer services and devices world wide.
● It serves as the phone book for the Internet by translating human friendly computer host names into IP addresses.
● The DNS can be quickly updated, allowing a service’s location on the network to change without affecting the end users.
● It distributes the responsibility of assigning domain names and mapping those names to IP addresses by designating authoritative names servers for each domain.
● It also specifies the technical functionality of database service. It defines the DNS protocol, a detailed specification of the data structure and data communication exchanges used in DNS, as part of the Internet Protocol Suite (IPS).
Question 3. Give an example of E-mail address and explain each part of it.
1. Username: On the left side of separator @ is the user name. A user name cannot have blanks.
2. Domain name for the host server: The portion to the right of @ identifies the server or host network that services your E-mail. It is also known as E-mail server.
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