CBSE Class 10 Computer Science Internet and World Wide Web Worksheet Set 01

Answer: Website. The pages are linked together and usually share a common domain name.

Teacher's Note:
1. A website is hosted on a web server and has a home page.
2. Individual documents inside it are called web pages.

Answer: World Wide Web.

Teacher's Note:
1. The WWW is a system of linked pages accessed through the Internet.
2. It is only one of the services that run on the Internet.

Answer: File Transfer Protocol. It is used to upload and download files between computers on a network.

Teacher's Note:
1. FTP moves files between a client and a server.
2. Web page uploads to a server are often done through FTP.

Answer: Browsers. A web browser is software used to access and display web pages.

Teacher's Note:
1. A browser requests pages from web servers and renders them.
2. Chrome, Firefox and Edge are all browsers, not search engines.

Answer: Protocol. Examples are HTTP, FTP, SMTP and TCP/IP.

Teacher's Note:
1. Both sender and receiver must follow the same protocol.
2. Protocols define format, order and error checking of data.

Answer: 63. The complete domain name can be up to 253 characters.

Teacher's Note:
1. Each label between dots has this limit.
2. The rule keeps domain names manageable for DNS.

Answer: HTTP stands for HyperText Transfer Protocol, and HTTPS is its secure (encrypted) version.

Teacher's Note:
1. HTTPS encrypts data between the browser and the server.
2. Look for the padlock symbol before entering passwords.

Answer: SMTP is used for sending e-mail; POP3 and IMAP are used for receiving (retrieving) e-mail.

Teacher's Note:
1. SMTP pushes messages to the mail server.
2. POP3 and IMAP pull messages from the server to the client.

Answer: Worldwide Interoperability for Microwave Access. It is a wireless technology for broadband access over long distances.

Teacher's Note:
1. WiMAX provides wireless Internet over a wide area.
2. It uses microwave radio signals.

Answer: Hypertext is text on a web page that contains links to other pages or documents. A hyperlink is the clickable element (text, image or button) that takes the user to another page, file or section when clicked.

Teacher's Note:
1. Hypertext is the idea and hyperlink is the actual link.
2. A hyperlink can be text, an image or a button.

Answer: (a) network: .net; (b) information: .info; (c) educational: .edu; (d) organisation: .org.

Teacher's Note:
1. Extensions are also called top-level domains.
2. Indian educational sites commonly use .ac.in or .edu.in.

Answer: Chat allows two or more users to exchange text messages instantly in real time. Many chat services also support voice and video calls, file sharing and group conversations.

Teacher's Note:
1. Chat gives instant two-way communication.
2. It is faster than e-mail because the message appears at once.

Answer: He should use the AND operator, for example: Wired Networking AND Network. The results will then contain both keywords.

Teacher's Note:
1. The AND operator narrows the search to pages containing all keywords.
2. OR would instead show pages containing either keyword.

Answer: A search engine is a program or website that searches the Web for pages matching the keywords typed by the user and lists them as results. Examples are Google and Bing.

Teacher's Note:
1. A search engine is different from a web browser.
2. It uses indexed information gathered by web crawlers.

Answer: A web server is a computer with special software that stores websites and delivers web pages to users' browsers when they send a request using HTTP.

Teacher's Note:
1. It receives a request and sends back the page.
2. One web server can host many websites.

Answer: A social networking site lets people create a personal profile and connect with friends, family and others online. Users can share text, photos and videos, chat, join groups and comment or react to posts. The site stores each user's data on its servers and shows content to the user's connections according to privacy settings. Facebook, Instagram and LinkedIn are examples. Users should keep profiles private and avoid sharing personal details with strangers.

Teacher's Note:
1. Explain profile creation, connections, sharing and privacy.
2. Safe use of such sites is an important part of cyber ethics.

Answer: 1. IP address: a unique numeric address given to each device on the network, for example 192.168.1.10. Computers use it to locate each other.
2. URL (Uniform Resource Locator): a human-readable address of a page, for example https://www.example.com/index.html. It has the protocol, the domain name and the path of the page. The DNS converts the domain name into the IP address.

Teacher's Note:
1. A URL is easier to remember than an IP address.
2. The Domain Name System links the two.

Answer: Internet: the worldwide network of interconnected computer networks that carries all kinds of data (web, e-mail, file transfer).
WWW: a collection of linked web pages and resources accessed over the Internet using a browser and HTTP.
The WWW is one service that runs on the Internet.

Teacher's Note:
1. The Internet is the infrastructure and the Web is a service on it.
2. E-mail also uses the Internet but is not part of the Web.

Answer: E-shopping means buying goods or services through websites or apps and paying online. E-banking means carrying out banking tasks such as checking balance, transferring money and paying bills through the Internet without visiting the branch.

Teacher's Note:
1. One is for purchases and the other for bank transactions.
2. Both need secure payment and login practices.

Answer: POP (Post Office Protocol): downloads mails to the local device and usually deletes them from the server, so they can be read offline on one device.
IMAP (Internet Message Access Protocol): keeps mails on the server and lets the user view them from many devices, with folders and status synchronised.

Teacher's Note:
1. IMAP keeps mail on the server whereas POP usually downloads it.
2. IMAP is better when using multiple devices.

Answer: Web browser: software (such as Chrome) installed on a device to open and view websites.
Web portal: a website that gathers information and services from many sources at one place, such as news, e-mail, search and shopping links, often with a personalised login.

Teacher's Note:
1. A browser is software, a portal is a website.
2. Examples of portals include Yahoo and the DigiLocker portal.

Answer: Internet banking lets customers use the bank's secure website or app to operate their accounts online.
Advantages: 1. It is available 24 hours a day from any place. 2. It saves time and the effort of visiting the branch. 3. Funds can be transferred and bills paid instantly. 4. Account statements can be viewed or downloaded easily. 5. Transactions are recorded and can be tracked.

Teacher's Note:
1. Mention both the meaning and at least four advantages.
2. Advise users never to share passwords or OTPs.

Answer: 1. Use only secure (HTTPS) websites and official apps. 2. Never share the password, PIN or OTP with anyone. 3. Do not log in on public computers or open Wi-Fi. 4. Do not click links in unknown e-mails or messages. 5. Check statements regularly and report any wrong transaction to the bank immediately.

Teacher's Note:
1. Safe habits protect against phishing and fraud.
2. Banks never ask for your PIN or OTP.