Ch-5 COMMUNICATION TECHNOLOGY

SECTION 5: SHORT ANSWER TYPE QUESTIONS-

1.   Define the following:

INTERSPACE: Interspace is a vision of what the internet will become in near future. It will enable the users to correlate information in multiple ways from multiple sources.

SERVER: A server is a powerful computer with high speed and great processing capability. It can link other computers or electronic devices together over servers to provide important services to both private and public users.

URL: An address or location of a website on the internet is called its URL.

HYPERLINKS: a highlighted word or picture in a document or Web page that you can click on with a computer mouse to go to another place in the same or a different document or Web page is called Hypertext.

Those highlighted words have links of web pages, which will be accessed by a single click are called hyperlinks.

Q2. What is Intranet and how is it different from Extranet?

Ans. Intranet refers to a computer network in an organization. It is different from Extranet because Extranet allows the controlled access from the outside whereas Intranet does not.

Q3. Write the full form of the following:

a.   NIC: Network Interface Card

b.   ISP: Internet Service Provider

c.    LAN: Local Area Network

d.   MAN: Metropolitan Area Network

e.   WAN: Wide Area Network

f.      PAN: Personal Area Network

Q4. When was Bluetooth technology invented?

Ans. Bluetooth technology invented in 1994 by Engineers at Ericsson,a Swedish company.

Q5. Which organization has the authorization off Wi-Fi?

Ans. Wi-Fi Alliance is the organization that has the authorization of Wi-Fi.

Q6. What is Multimedia? What are the important elements of multimedia?

Ans. Multimedia can be termed as the combination of several types of media i.e., text, audio, graphics, animation and video.

The important elements of multimedia are text, Audio, Graphics, Animation and Video.

Q7. Give examples of each of the following:

a.   Modem: Wired Modem and Wireless modem.

b.   Transmission Media: Guided Media and Unguided Media

c.    Fiber Cable: Single mode and Multi-Mode

d.   Wireless Network technology: Bluetooth technology and Infrared technology.

Q8. What is the maximum data transmission range of Bluetooth technology?

Ans. The maximum data transmission range of Bluetooth technology is 10 meters.

Q9. On Which standard is Wi-Fi Based?

Ans. It is based on IEEE (Institute of Electrical and Electronics Engineers) 802.11 standards.

Q10. Differentiate between a webpage and a website?

Ans. The Page of a website is known as Web page whereas a website consists of a number of web pages that holds large amount of information.

Q11. Which are the most commonly used web browsers?

Ans. The most commonly used web browsers are Microsoft Internet explorer, Mozilla Fire Fox, Netscape Navigator, Apple, Safari, and Google Chrome.

Q12. Name any four private Internet Service Providers in India.

Ans. BSNL, Reliance, Airtel, Idea and Connect.

Q13. Which company took the initiative to start internet service in India?

Ans. Internet services started on 15^th August 1995 through a government owned company called VSNL (Videsh Sanchar Nigam Ltd).

Q14. Name any three network components.

Ans. Server, Client and Network Interface Card[NIC] are the three main network components.

Q15. What are the three types of cables used in Wired networking technology?

Ans. The three types of cables used in Wired networking technology [Guided Media] are Twisted Pair cable, Co-axial cable and Optical fiber cable.

Q16. Write an application of Co-axial cable. Why is it called coaxial cable?

Ans. Co-axial cable is widely used for Cable television system for local area networks. It is called co-axial cable as both the conductors share the same geometric axis.

SECTION 6: LONG ANSWER TYPE QUESTIONS-

Q1. Differentiate between LAN, MAN and WAN.
Ans. 

Q2. Describe the different types of networks.
Ans. ·         Local Area Network (LAN)

This is one of the original categories of network, and one of the simplest.  LAN networks connect computers together over relatively small distances, such as within a single building or within a small group of buildings.

Homes often have LAN networks too, especially if there is more than one device in the home.

·         Wide Area Network (WAN)

This is another of the original categories of network, and slightly more complex in nature. WAN networks connect computers together over large physical distances, remotely connecting them over one huge network and allowing them to communicate even when far apart. The Internet is a WAN, and connects computers all around the world together.

LANs connect to WANs, such as the internet, using routers to transfer data and information quickly and securely. WANs are usually too large to be controlled by one administrator, and so usually have collective ownership, or in the case of the internet, is publicly owned.

Metropolitan Area Network: This is a network which is larger than a LAN but smaller than a WAN, and incorporates elements of both. It typically spans a town or city and is owned by a single person or a company, such as local council or a large company.

Personal Area Network: This type of network  is mainly created for an individual person. It consist of a desktop/laptop computer, mobile phone or a handheld computing device. You can use these networks to transfer files including email, digital photos and music etc.

PAN generally covers a range of less than 10 meters.