Q20. What do you mean by a search engine? Name two popular search engines. What role do search engines play in Web surfing?
Ans. A search engine helps in searching information on the Internet according to the specified criterion. For example, if a user wants to know which universities in Delhi offer management courses, then transform the information requirement into a search criterion and feed it into a search engine. Within seconds, a long list of websites will appear on the monitor, which will provide users with the desired information.
Two popular search engines are as follows:
A search engine plays a vital role in Web surfing. The search engines allow users to find information on the Internet on the basis of the specified search criteria. They provide a number of related links when a search query is specified to them thereby allowing the users to visit different Web pages of same or different websites. This continuous search for the information on the Internet is known as Web surfing
Q19. Expand and explain the following terms:
Write notes on each of them.
- HTML: HTML stands for HyperText Markup Language. It is a markup language containing tags to design Web pages. When a Web page is opened in the Web browser, the formatted content is displayed instead of tags. HTML is used to design the layout of a Web page. Read More …
Q18. List the advantages of e-mail.
Ans. The following are the main advantages of e-mail:
- Saves paper and allows users to edit the message easily,
- Transmits messages faster than other conventional forms of communication, such as speed post and courier service,
- Allows users to send and receive messages according to their comfort and convenience level, i.e. a user need not go to buy stamps and envelopes and then post the letter in the post office, Read More …
Q17. Describe the e-mail service.
Ans. E-mail is one of the most popular and important services provided by the Internet. Today, email has become one of the most widely used tools of communication. Through e-mail, a user can communicate with anyone around the world by sending and receiving electronic messages within seconds. In the 1970s, when the e-mail service had just started, user could only send textual messages. However, today it is possible to send or receive Read More …
Q16.What are the uses of the Internet?
Ans. Internet has undergone a phenomenal growth since the last decade. From searching for information to downloading music and videos, sending and receiving e-mail messages to communicate with friends, and conducting everyday transactions, the Internet has become an integral part of our lives. The Internet has evolved as a fast and economically feasible mode of communication. Read More …
Q15. Differentiate between a dial-up connection and a wireless connection.
Ans. A dial-up connection is a temporary connection that uses the public switched telephone network (PSTN) to connect to the Internet. This type of connection is set up between the client’s computer and the ISP server. The dial-up connection is established with the help of a modem (a device that allows the computer to transfer data over a phone line). An Internet connection established through a dial-up connection is available till the time client is connected to the ISP server. Once the client gets disconnected from the ISP server, the client needs to restart the dial-up connection to connect to the Internet again. Therefore, it will need a dedicated line to remain connected to the Internet. On the other hand, a wireless connection refers to a connection that does not use any wires to communicate or transfer information or data between two or more computers (or other devices, such as mobile phones). The distance between the devices connected to each other through a wireless Internet connection does not affectthe rate of data transfer between them.
Q14. What does it mean when we say that Lynx is a text-based Web browser? Name some graphical Web browsers.
Ans. A Web browser is an application that is used to access or retrieve information or resources from the Internet. This information is available in different formats, such as audio and video files, text and images. Although, a Web browser is specifically designed to access information from the Internet, it can also be used to access resources on the local Intranet or files in a file system. Read More …
Q13. What do you understand by the term ‘domain name’?
Ans. Domain name is the third component of a URL, and represents the name of one or more computers that act as servers on the Internet. For example, in the URL, http://www.google.com, Google specifies the domain name. A large website, such as Google or Yahoo!, uses more than one computer and this entire group of computers acts as a single server. A domain name must be Read More …
Q12. What is a Web portal?
Ans. A Web portal refers to a website that presents information from several sources. It also contains hyperlinks to many other websites. When a user clicks any of these hyperlinks, he/she is redirected to the linked Web page. Examples of Web portals like Yahoo!, AOL, MSN and Netscape signifies the next stage of the Web portal development. The term Web portal started to be used Read More …
Q11. How Internet is different from the Intranet?
Ans. Intranet is a private network that is accessible only within an organization. It is based on the Internet technology and therefore can be used by several users across multiple locations and still remain private. Intranet allows the employees to access data of an organization easily and economically, while protecting the information from unauthorized access.
On the other hand, the Internet is a collection of millions of computers connected together across countries and continents, forming a worldwide network. This global network allows easy access and transfer of data and communication among people anywhere in the world.