StudenteCare mission is to give people the power to build educational community and bring the Educators, Students, Parents, Consultant, University, Colleges, Schools and Coachings closer together
Ncert Solution | Ncert Solution for class 9th | NCERT solution for Class 9 Foundation of Information Technology | NCERT FOUNDATION OF INFORMATION TECHNOLOGY CHAPTER 4 COMMUNICATION TECHNOLOGY
by   Pooja Singla
Files Overall Price:    0.00
Videos Overall Price:    0.00
Total Overall Price:    0
Sold By:    Pooja Singla

Description Above File

NCERT Solutions for Class 9 Foundation of Information Technology chapter 4 Communication Technology

NCERT Solutions for Class 9 Foundation of Information Technology – Communication Technology are prepared by CBSE student eCARE expert to score good marks in class 9. This chapter contain many topics which are very important to score good in class 9. There are some important topic mentioned below:

File and Data Sharing
At a time, file-sharing consisted mostly of saving documents to floppy disks that could be physically transferred to other computers by hand. With networking, files can be shared instantaneously across the network, whether with one user or with hundreds users
Resource Sharing
Computer networking also allows the sharing of network resources, such as printers, scanners, dedicated servers, backup systems, input devices and Internet connections.
Data Protection and Redundancy
Computer networking allows users to distribute copies of important information across multiple locations, ensuring essential information is not lost with the failure of any one computer in the network.
Ease of Administration
Instead of individually upgrading each computer in an organisation, a network administrator can initiate an upgrade from a server and automatically duplicate the upgrade throughout the network
User Communications
Computer networking also allows organisations to maintain complex communication systems. It also allow users to communicate using E-mail, newsgroups, video conferencing etc.
Distributed Computing Power
In computer networks, we can distribute tasks across multiple computers throughout the network, by breaking complex problems into hundreds or thousands of smaller operations, which are then parceled out to individual computers.
Network Gaming
A lot of network games are available, which allow multi-users to play from different locations. It is a type of online game, i.e. played through social networks.

 

Description Below File

Some questions are asked by class 9 students related to Foundation of Information Technology

Question 1.
Name the term defined by given below statement:
“A group of computers connected to each other by a link.”
Answer:
Computer network is defined as a group of computers connected to each other by a link.

Question 2.
Two people, one knowing only English and other knowing only Chinese are talking to each other. Can we call it a communication?
Answer:
No, because only a meaningful exchange of information between two living beings is called communication.

 

Question 3.
Give few examples of communication technology.
Answer:
Telephones, mobiles, fax, Internet etc., are some examples of communication technology.

Question 4.
Write down the components of a computer network established between the two offices of a company across the cities.
Answer:
The five components will be involved in this computer network, since telephone lines will be used as communication channel.

  • Sender
  • Data communication device at sender’s end
  • Communication channel
  • Data communication device at receiver’s end
  • Receiver

Question 5.
What is the importance of communication channel?
Answer:
Communication channel is responsible for carrying data in the form of signals from sender to receiver.

Question 6.
List down the types of computer networks.
Answer:
Following are the three main types of computer networks, based upon the geographical area as follows:

  • Local Area Network (LAN)
  • Metropolitan Area Network (MAN)
  • Wide Area Network (WAN)

Question 7.
Which cable networks are used for LAN connections?
Answer:
Twisted pair and fibre optic cables are used for LAN connection.

Question 8.
Why Internet is called a network of networks?
Answer:
Internet is called a network of networks because it connects several large and all heterogeneous networks together into a bigger network.

 

Question 9.
Give one basic difference between guided and unguided transmission channels.
Answer:
In guided transmission media, cables (or wires) are used for communicating data while in unguided transmission, in place of cables, signals travel through air.

Question 10.
Why wires in twisted pair cable are twisted around each other?
Answer:
Wires are twisted to provide protection against crosstalk and noise.

 

Question 11.
When we transmit signal over a long distance, the intensity of the signal is reduced. What could be the solution for this problem?
Answer:
We can use a networking device called repeater, regenerates the feeble signal and transmit it.

Question 12.
Write down the name of communication channel used for telephone line and TV
Answer:
Communication channel for telephone line is twisted pair cable and for TV is co-axial cable.

 

Question 13.
Which guided media provide secure transmission amongst all of them?
Answer:
Optical fibre provides secure transmission as compared to twisted pair and co-axial cable. As, it is more immune to tapping than copper cables.

Question 14.
How is crossover Ethernet cable different from rest of the Ethernet cables?
Answer:
A crossover cable is a special type of Ethernet cable specially designed for connecting two computers, whereas most Ethernet cables are designed to connect one computer to a router or a switch.