This page contains the CBSE Computer Science with Python class 12 Unit-5 chapter 1 Networking Concepts – I. You can find the solutions for chapter 1 of CBSE class 12 Computer Science with Python Exercise. So is the case if you are looking for CBSE class 12 Computer Science with Python related topic Networking Concepts – I questions and answers for the Exercise.
Exercise
Question 1
1. Fill in the blanks:
a.
Two or more computers connected to each other for information exchange form a . (Network ✔)
b.
The range of frequencies available for transmission of data is called . (Bandwidth ✔)
c.
is the network of networks. (Internet ✔)
d.
A technique in which a dedicated and complete physical connection is established between two nodes for communication is switching. (Circuit ✔)
e.
Any computer attached on the network is called a . (Node ✔)
Answer 1
a.
Network
b.
Bandwidth
c.
Internet
d.
Circuit switching
e.
Node
Question 2
2. Multiple Choice Questions:
1)
Choose the option, which is not included in networking.
a. Access to remote database
b. Resource sharing
c. Power transferring ✔
d. Communication
2)
Data transfer rate is often measured in
a. Mbps
b. Kbps
c. Bps ✔
d. gbps
3)
Which one of the following is not in the category of communication channels?
a. narrow band
b. broad band
c. light band ✔
d. voice band
4)
The greater the bandwidth of a given medium, the ________ is the data transfer rate
a. higher ✔
b. lower
c. both a and b
d. neither a nor b
5)
What is the approximate bandwidth of a typical voice signal?
a. 2KHz
b. 2MHz
c. 3KHz ✔
d. 3MHz
Answer 2
1)
c. Power transferring
2)
c. Bps
3)
c. light band
4)
a. higher
5)
c. 3KHz
Question 3
3. What is a network? Give any two uses of having a network in your school computer lab.
Answer 3
Network is a collection of independent computers connected through a communication medium to exchange data and share resources.
Any two uses in a school computer lab:
•
Resource sharing: multiple computers can use common hardware/software such as printers and application programs.
•
Data sharing and communication: students and teachers can share files and communicate quickly over the lab network.
Question 4
4. Mention any two disadvantages of a network.
Answer 4
•
Security risk: if proper security is not applied, unauthorized users may access or misuse shared data and resources.
•
High setup and maintenance cost: networking needs NICs, cabling/devices, software setup, and regular administration/troubleshooting.
Question 5
5. Two students in the same class sitting inside the same room have connected their laptops using Bluetooth for working on a group presentation. What kind of network have they formed?
Answer 5
PAN (Personal Area Network).
This is a short-range personal network formed around individuals using devices like laptops/phones, commonly through Bluetooth.
Question 6
6. Expand the following:
a.
ARPANET.
b.
PAN
c.
NIU
d.
MAN
Answer 6
a.
ARPANET: Advanced Research Projects Agency Network (early packet-switched network).
b.
PAN: Personal Area Network (short-range personal network).
c.
NIU: Network Interface Unit (helps connect systems for communication).
d.
MAN: Metropolitan Area Network (city-level network).
Question 7
7. What are the requirements for setting up a network?
Answer 7
Requirements of a network include:
•
At least two computers (server/client workstation).
•
Network Interface Cards (NIC) in each system.
•
A connection medium (wired/wireless) to carry data.
•
Network Operating System (NOS) software.
These components together enable communication, resource sharing, and network management.
Question 8
8. How is a dedicated server different from a non dedicated server?
Answer 8
Basis
Dedicated Server
Non dedicated Server
Role
Works only as server.
Works as server and workstation.
Resource use
Resources are reserved for network services.
Resources are shared with local user tasks.
Performance
Usually better for heavy network load.
Usually lower compared to dedicated server.
Reliability/Control
Provides better centralized control and reliability for users.
Less centralized control because local tasks also run on it.
Question 9
9. Two companies in different states wanted to transfer information. Which type of network will be used to implement the same?
Answer 9
WAN (Wide Area Network).
Since the companies are in different states, a large geographical area is involved, which is covered by WAN.
Question 10
10. Two schools in the same city wanted to transfer e-learning information. Which type of network will be used to implement the same?
Answer 10
MAN (Metropolitan Area Network).
Both schools are within the same city, so city-level connectivity is best represented by MAN.
Question 11
11. Two teachers in the same school sitting in different labs wanted to transfer information. Which type of network will be used to implement the same?
Answer 11
LAN (Local Area Network).
Both teachers are in the same school campus (short distance), which is a typical LAN setup.
Question 12
12. Define a protocol. Name any two protocols used on Internet.
Answer 12
A protocol is a set of rules that defines how data is formatted, transmitted, and received between networked devices.
Any two Internet protocols are TCP (Transmission Control Protocol) and IP (Internet Protocol).
Question 13
13. Differentiate between :
a.
Internet and Interspace
b.
Circuit Switching and Packet Switching technique
c.
LAN , WAN and MAN
Answer 13
a) Internet and Interspace
Basis
Internet
Interspace
Meaning
Network of networks spread across the globe.
Client/server software program for real-time online communication in dynamic 3D environments.
Nature
Global network infrastructure.
Communication application/platform.
Primary purpose
General data/resource access (web, email, file transfer, services).
Interactive multi-user communication in virtual environment.
Scope
Worldwide public connectivity.
Application-level environment over network.
b) Circuit Switching and Packet Switching
Basis
Circuit Switching
Packet Switching
Path
Dedicated complete physical path is established.
Data is sent as packets over shared links.
Resource use
Path remains reserved for that communication.
Shared medium gives efficient utilization.
Transmission unit
Continuous stream over fixed circuit.
Discrete packets with headers (routing information).
Delay behavior
More predictable after setup.
Variable delay may occur due to traffic/congestion.
Used in
Traditional dedicated-link communication.
Fundamental method behind Internet and most LANs.
c) LAN, WAN and MAN
Basis
LAN
MAN
WAN
Coverage
Short distance (building/campus)
City scale (about 5 to 50 km)
Large geographical area (country/continent)
Ownership
Usually private (single organization).
Private/public or service-provider managed.
Often uses public + private communication lines.
Typical speed
Relatively high.
High (often backbone links inside city).
Comparatively lower than LAN for end users.
Example
School lab network
City-wide network
Inter-state/global network, Internet
Summary: These are differentiated mainly by function, transmission method, and geographic coverage.
Question 14
14. Define a node and an NIU?
Answer 14
Node: A computer/device attached to a network that can send or receive data.
NIU (Network Interface Unit): A network interface device that helps establish communication between the server and workstations by connecting them to the network medium.
Question 15
15. Define a channel. Name the three categories of communication channel.
Answer 15
Channel is a medium used in the transmission of a message from one point to another.
Three categories of communication channel:
•
Narrow band
•
Voice band
•
Broad band
These categories are based on available frequency range and therefore affect data carrying capacity.
Question 16
16. What do you mean by bandwidth and DTR?
Answer 16
Bandwidth is the range of frequencies available for data transmission (difference between highest and lowest frequency), usually expressed in Hertz (Hz).
DTR (Data Transfer Rate) is the amount of digital data moved from one place to another in a given time, usually measured in bps (bits per second).
Hence, in general, higher bandwidth gives higher DTR and faster data transfer.