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Exercise
Class-VII- Chapter-1
A. Multiple
choice questions:
1. A computer
network enables two or more computers to share __________ and resources.
a. Data b. information c. memory d.
option
Answer: Data
2. Networking
of computers is a basic need of today’s:
a. Era b.
world c. day d. children
Answer: World
3. One of the
advantages of computer networks is:
a. Internet b. accuracy c.
speed d. service
Answer: Speed
4. Computer
networks save a lot of ______ for any organizations in different ways.
a. Energy b. time c.
money d. cost
Answer: Cost
5. One of the
major drawbacks of computer networks is the ______ issues.
a. Electricity b. password c. time d.
security
Answer: Security
6. Resource
sharing is another important benefit of a ________ network.
a. Area b. mobile c. computer d.
Bluetooth
Answer: Computer
7. A server is
the ________ that controls functioning of other computers.
a. Protector b. administrator c. manager d.
client
Answer: Administrator
8. A network
interface card more commonly referred to as a :
a. NIC b. LAN c. GUI d. ALU
Answer: NIC
9. It is
difficult to make the ________ secure from hackers.
a. System b. network c.
viruses d. data
Answer: System
10.
In ________ two or more computers and peripheral devices are
connected within a small area.
a. MAN b. WAN c.
LAN d.
NIC
Answer: LAN
B. Write
true or false statements:
1. Computer
also raises the standard of the organization. T
2. A hacker can
get unauthorized access by using different tools. T
3. Resource
sharing is another important benefit of a computer network. T
4. NIC is a
circuit board that regulates exchange of data between the network and computers. T
5. A network is
a group of two or more computer systems linked together.T
6. The best
example of MAN is client server. F
7. Network
clients make request to a server by sending messages. T
8. Star
topology is mostly used in Local Area Networks. T
C. Fill
in the blanks:
1. A computer
network enables two or more computers to share____ and resources.
Answer: Data
2.
Network can spread to other computers throughout a
computer______________.
Answer: Network
3.
_______ is a central connection point in a network.
Answer: Hub
4.
Microwave is the most commonly used _______ medium.
Answer: wireless
5.
Infrared is one of the most________ forms of wireless communication.
Answer: Primitive
6.
Star topology used in ________________ and offices.
Answer: Home
7.
________ is a computer that manages the storage and retrieval of
files.
Answer: File server
8.
_________ is the kind of copper cable.
Answer: Coaxial
9.
Network interface card is also known as ________________.
Answer: Network
10.
Wired transmission channels help in transmission of ________ over
a wire based networking.
Answer: Data
D. Answer
the following questions in short:
1. What is
computer network?
Answer: A computer network is a group of
two or more computer systems linked together.
2. What are the
advantages of computer network?
Answer: Advantages of computer network
are:
a. Speed
b. Cost
effective
c. Security
concerns
d. Centralised
software management
e. Resource sharing
3. What is LAN?
Answer: In LAN two or more computers and
peripheral devices are connected within a small area, as in a room, office
building or a campus.
4. What is
network interface card?
Answer: Network Interface card is also
known as network adapter. The NIC is a circuit board that regulates exchange of
data between the network and computers or in other words we can say that is
necessary for receiving and sending data.
5. Write the
advantage of peer-to-peer architecture.
Answer: There is no need for full time
system administrator; every user is the administrator of his machine. Use can
control their shared resources.
6. Define
coaxial cable.
Answer: Coaxial cable is the kind of
copper cable. It is one of the cheapest and the most commonly used wire based
networking.
7. What is
Infrared?
Answer: Infrared is one of the most
primitive forms of wireless communication. It is basically suitable for short
distance communication.
E. Answer
the following questions in detail:
1. What is networking?
Give two advantages.
Answer: A computer network enables two or
more computers to share data and resources.
Two advantages:
a. Speed.
b. Cost
effective.
2. What are the
disadvantages of connecting computers in a network?
Answer:
a. The main
disadvantage of computer networks is that users become dependent upon them.
b. It is
difficult to make the system secure from hackers, movies or industrial
intelligence.
c. Viruses can
spread to other computers throughout a computer network.
3. What are the
different components of a computer network? Explain them briefly.
Answer: Different component of computer
network:
a.
Client: Any computer that is the part of common network other than
the server is called as client.
b.
Server: A server is just like any other computer of the network.
c.
Workstation: A workstation is a computer intended for individual
use in a networking environment.
4. What is
topology? Give an example.
Answer: The physical arrangement of the
cables, computers and other peripheral devices to form a network is known as a
topology.
a.
Bus topology
b.
Ring topology
c.
Star topology
5. Describe the
different types of typologies for a computer network.
Answer:
a. Bus
topology: Bus
topology refers to a single cable that connects all the workstations, servers,
printers and other devices on the network.
b. Star
topology: Star
topology is the most common type of topology that is used in homes and offices.
This type of topology is where all the computers and devices on the network
connect to a central device.
c. Ring
topology: In
ring topology, all the nodes are connected to one another in such a way that
they make a closed loop.
6. Describe
peer-to-peer architecture.
Answer: Peer to peer architecture is a
commonly used computer networking architecture in which each workstation, or
node has the same capabilities and responsibilities.
7. What is a
server? Explain with an example.
Answer: A server is just like any other
computer of the network. It can be distinguished with its large storage
capacity and the role that is assigned to it. This is the administrator that
controls functioning of other computers.
8. Where do we
use Ring topology? Explain with an example.
Answer: In ring topology all the nodes
are connected to one another in such a way that they make a closed loop. Each
workstation is connected to two other components on either side.
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