CBSE Class 10 Computer Applications Internet, E-mail and Protocols Assignment Set 02

Answer: A newsgroup is an online discussion forum in which people with a common interest post messages and read and reply to messages of others on a particular topic.

Teacher's Note:
1. Messages are organised by subject so members can follow a discussion.
2. It is different from e-mail because posts are visible to the whole group.

Answer: Protocols are agreed rules that control how data is sent and received between devices on a network. One example is HTTP, which is used to transfer web pages.

Teacher's Note:
1. Protocols let different computers communicate smoothly.
2. FTP, SMTP and TCP/IP are other common examples.

Answer: (a) HTTP: HyperText Transfer Protocol
(b) FTP: File Transfer Protocol
(c) ISP: Internet Service Provider
(d) URL: Uniform Resource Locator

Teacher's Note:
1. Write full forms with the correct capital letters.
2. FTP is used for uploading and downloading files.

Answer: E-mail is fast (delivered in seconds), cheap (no stamps or paper), can carry attachments such as photos and documents, can be sent to many people at once, and can be read from any device with an internet connection.

Teacher's Note:
1. Speed and low cost are the two main reasons.
2. Mention at least three points for full marks.

Answer: A web crawler (also called a spider or bot) is a program used by search engines that automatically visits web pages, follows their links and collects information to build the search engine's index.

Teacher's Note:
1. Crawlers are why a search engine can return results so quickly.
2. They work continuously because web pages keep changing.

Answer: A Wi-Fi hotspot is a place, such as an airport, a cafe or a campus, where a wireless access point lets nearby devices connect to the Internet without cables, within a limited range.

Teacher's Note:
1. The range of a hotspot is usually only a few tens of metres.
2. Public hotspots may be free or paid.

Answer: Google, Bing, DuckDuckGo and Yahoo Search (Yandex and Ecosia are also correct).

Teacher's Note:
1. A search engine finds web pages that match the words you type.
2. A search engine is different from a web browser.

Answer: ARPANET (Advanced Research Projects Agency Network) was a network started in the late 1960s by the U.S. Department of Defense to connect computers of research institutions. It was the first network to use packet switching and its growth, with the TCP/IP protocols, led to today's Internet.

Teacher's Note:
1. ARPANET is regarded as the ancestor of the Internet.
2. Remember that it connected only a few universities at first.

Answer: Worldwide Interoperability for Microwave Access.

Teacher's Note:
1. Wi-MAX is a wireless broadband technology covering larger areas than Wi-Fi.
2. Learn it along with Wi-Fi (Wireless Fidelity).

Answer: 1. It gives quick access to information on almost any subject.
2. It allows fast and cheap communication through e-mail, chat and video calls.
(Online shopping, banking and learning are also correct.)

Teacher's Note:
1. Give two clear and different advantages.
2. Short examples improve the answer.

Answer: 1. Wi-Fi: a wireless router connected to a broadband line lets devices within its range join the Internet.
2. Wi-MAX / mobile broadband (3G, 4G, 5G data): connection is provided through towers over a wide area, so a device can connect while moving.

Teacher's Note:
1. Wireless broadband avoids laying a cable to every device.
2. Name the technology first and then explain it briefly.

Answer: 1. Hypertext: pages contain links to other pages.
2. Multimedia: text, images, audio and video can be shown together.
3. Client-server model: browsers (clients) request pages from web servers.
4. Universal access: any page can be opened with a URL from any place with an internet connection.

Teacher's Note:
1. The WWW is a service that runs on the Internet.
2. It is not the same thing as the Internet itself.

Answer: (a) A web browser is software that requests and displays web pages (for example, Chrome); a web server is a computer that stores web pages and sends them when asked.
(b) Uploading is sending a file from your computer to a remote computer; downloading is receiving a file from a remote computer to yours.
(c) A blog is a website of regularly updated posts; a blogger is the person who writes it.

Teacher's Note:
1. Write one sentence for each term in every pair.
2. Direction of transfer is the key idea in part (b).

Answer: E-shopping (online shopping) is buying goods or services over the Internet using a website or an app. Advantages: shopping is possible any time from home, many products and prices can be compared easily, and goods are delivered to the door.

Teacher's Note:
1. Payment can be made online or on delivery.
2. Mention at least two advantages.

Answer: (a) Google Chrome: a fast web browser developed by Google, available on computers and phones, with tabs, bookmarks and extensions.
(b) Mozilla Firefox: a free and open-source web browser from the Mozilla organisation that stresses privacy and supports add-ons.

Teacher's Note:
1. A browser is used to view web pages.
2. Edge and Safari are other browsers you can name.

Answer: <HTML>
<HEAD>
<TITLE>Page title</TITLE>
</HEAD>
<BODY>
Page content
</BODY>
</HTML>

Teacher's Note:
1. The title goes in the head and is shown on the browser tab.
2. Everything visible on the page goes in the body.

Answer: Q<SUP>2</SUP> + R<SUP>2</SUP>

Teacher's Note:
1. SUP makes the text a superscript.
2. Do not forget the closing </SUP> tags.

Answer: BGCOLOR sets a solid colour as the page background, for example <BODY BGCOLOR="yellow">. BACKGROUND sets an image as the page background, for example <BODY BACKGROUND="sky.jpg">.

Teacher's Note:
1. One takes a colour and the other takes an image file.
2. The image repeats (tiles) if it is smaller than the page.