Introduction to Computer Networks | Chapter 1 | Class 10 Computer Science 571 (NCERT) Question and Answer | Class 10 Computer Science 571 (NCERT) Question and Answer Solutions English Medium |
Introduction to Computer Networks
Chapter 1
Exercises
I. FILL IN THE BLANKS
1. The hostname command is used to display _________________.
1. āĻৃāĻšāϏ্āĻĨā§° āύাāĻŽ āĻāĻĻেāĻļ _________________ āĻĒ্ā§°āĻĻā§°্āĻļāύ āĻā§°িāĻŦāϞৈ āĻŦ্āĻ¯ā§ąāĻšাā§° āĻā§°া āĻšāϝ়।
Ans: name of the computer
2. The length of a IPv4 and a IPv6 is ---- and ---- bytes respectively.
āĻāĻা IPv4 āĻā§°ু āĻāĻা IPv6 ā§° āĻĻৈā§°্āĻ্āϝ āĻ্ā§°āĻŽে ---- āĻā§°ু ---- āĻŦাāĻāĻ।
Ans: 32 and 128
3. An access point is used to connect _______________ .
_______________ āϏংāϝোāĻ āĻā§°িāĻŦāϞৈ āĻāĻা āĻāĻ্āϏেāĻ āĻĒāĻāĻŖ্āĻ āĻŦ্āĻ¯ā§ąāĻšাā§° āĻā§°া āĻšāϝ়।
Ans: wireless networks
4. The ping command is used to _______________ .
āĻĒিং āĻāĻŽাāĻŖ্āĻĄāĻো _______________ āĻā§°িāĻŦāϞৈ āĻŦ্āĻ¯ā§ąāĻšাā§° āĻā§°া āĻšāϝ়।
Ans: to test a device on the network is reachable.
5. HTTPS transfer ______________ data.
āĻāĻāĻāĻিāĻিāĻĒিāĻāĻে ______________ āĻĄাāĻা āϏ্āĻĨাāύাāύ্āϤ⧰ āĻā§°āĻ।
Ans: encrypted
II. MULTIPLE CHOICE QUESTIONS:
1. Which device is required to connect multiple heterogeneous networks?
āĻāĻাāϧিāĻ āĻŦৈāώāĻŽ্āϝāĻĒূā§°্āĻŖ āύেāĻā§ąাā§°্āĻ āϏংāϝোāĻ āĻā§°িāĻŦāϞৈ āĻোāύāĻো āĻĄিāĻাāĻāĻā§° āĻĒ্ā§°āϝ়োāĻāύ?
A) Hub
B) Switch
C) Router
D) Access Point
āĻ) āĻšাāĻŦ
āĻ) āĻুāĻāĻ
āĻ) ā§°াāĻāĻাā§°
āĻ) āĻĒ্ā§°ā§ąেāĻļ āĻĒāĻāĻŖ্āĻ
Ans: C) Router
2. Which is the largest type of computer network?
⧍/ āĻāĻŽ্āĻĒিāĻāĻাā§°ā§° āύেāĻā§ąā§°্āĻ āĻāĻাāĻāϤāĻৈ āĻĄাāĻā§° āϧ⧰āĻŖā§° āĻোāύāĻো?
A) PAN
B) LAN
C) MAN
D) WAN
āĻ) āĻĒাāύ
āĻ) āϞেāύ
āĻ) āĻŽাāύুāĻš
āĻ) ā§ąাāύ
Ans: D) WAN ( ā§ąাāύ)
3. Which protocol transfers encrypted data instead of plain data?
āĻোāύāĻো āĻĒ্ā§°āĻ'āĻāϞে āϏাāϧাā§°āĻŖ āϤāĻĨ্āϝ⧰ āĻĒā§°িā§ąā§°্āϤে āĻāύāĻ্ā§°িāĻĒ্āĻ āĻā§°া āϤāĻĨ্āϝ āϏ্āĻĨাāύাāύ্āϤ⧰ āĻā§°ে?
A) HTTP
B) HTTPS
C) FTP
D) SMTP
āĻ) āĻāĻāĻāĻিāĻিāĻি
āĻ) āĻāĻāĻāĻিāĻিāĻĒিāĻāĻ
āĻ) āĻāĻĢ āĻি āĻĒি
āĻ) āĻāĻ āĻāĻŽ āĻি āĻĒি
Ans: B) HTTPS (āĻāĻāĻāĻিāĻিāĻĒি āĻāĻ)
4. How many bytes are reserved for OUI in a MAC address?
āĻāĻা MAC āĻ িāĻāύাāϤ OUI ā§° āĻŦাāĻŦে āĻিāĻŽাāύ āĻŦাāĻāĻ āϏংā§°āĻ্āώিāϤ āĻā§°া āĻšৈāĻে?
A) 3
B) 8
C) 24
D) 12
āĻ) ā§Š
āĻ) ā§Ž
āĻ) ⧍ā§Ē
āĻ) ⧧⧍
Ans: C) 24 (⧍ā§Ē)
5. IP address can be automatically assigned if the network is connected with
IP āĻ িāĻāύা āϏ্āĻŦāϝ়ংāĻ্ā§°িāϝ়āĻাā§ąে āύিāϝুāĻ্āϤ āĻā§°িāĻŦ āĻĒাā§°ি āϝāĻĻি āύে'āĻā§ąā§°্āĻā§° āϏৈāϤে āϏংāϝুāĻ্āϤ āĻšāϝ়
A) Access Point
B) Mail Server
C) Web Server
D) DHCP Server
āĻ) āĻĒ্ā§°ā§ąেāĻļ āĻĒāĻāĻŖ্āĻ
āĻ) āĻŽেāĻāϞ āĻাā§°্āĻাā§°
āĻ) ā§ąেāĻŦ āĻাā§°্āĻাā§°
āĻ) DHCP āĻাā§°্āĻাā§°
Ans: D) DHCP Server (āĻ) DHCP āĻাā§°্āĻাā§°)
III. SHORT ANSWER QUESTIONS
1. Mention the name of components required to set up a MAN network. Draw a block diagram of a MAN network labeling name of each component.
āĻāĻা MAN āύে'āĻā§ąā§°্āĻ āϏংāϏ্āĻĨাāĻĒāύ āĻā§°িāĻŦāϞে āĻĒ্ā§°āϝ়োāĻāύীāϝ় āĻāĻĒাāĻĻাāύāϏāĻŽূāĻšā§° āύাāĻŽ āĻāϞ্āϞেāĻ āĻā§°āĻ। āĻĒ্ā§°āϤিāĻো āĻāĻĒাāĻĻাāύ⧰ āĻāĻা MAN āύে'āĻā§ąā§°্āĻ āϞেāĻŦেāϞিং āύাāĻŽā§° āĻāĻা āĻŦ্āϞāĻ āĻĄাāϝ়াāĻ্ā§°াāĻŽ āĻ ংāĻāύ āĻā§°āĻ।
(Hint: MAN network is a connection of multiple LAN)
(āĻংāĻিāϤ: MAN āύেāĻā§ąাā§°্āĻ āĻšৈāĻে āĻāĻাāϧিāĻ LAN ā§° āĻāĻা āϏংāϝোāĻ)
Ans: The name of components required to set up a Man network was-
1.Bridges Versus Access Points. Access points connect multiple users wirelessly to each other and to a wired network. .
2. Basic Ethernet-to-Wireless Bridges. ..
3. Workgroup Bridges. ...
4.Semidirectional Antennae. ...
5.Highly Directional Antennae. .
6. Effect of Polarization.
2. Why hostname should not be used to identify a computer in a computer network?
āĻāĻŽ্āĻĒিāĻāĻাā§° āύেāĻā§ąā§°্āĻāϤ āĻāĻŽ্āĻĒিāĻāĻাā§° āĻিāύাāĻ্āϤ āĻā§°িāĻŦāϞৈ āĻৃāĻšāϏ্āĻĨā§° āύাāĻŽ āĻিāϝ় āĻŦ্āĻ¯ā§ąāĻšাā§° āĻā§°া āĻāĻিāϤ āύāĻšāϝ়?
Ans: The name host points to the domain where this physical device and network are part. Explanation: The IP address points to the Network section where this physical hardware is part. So should not used to identify a computer in a computer network.
(āύাāĻŽ āĻšāϏ্āĻে āĻāĻ āĻৌāϤিāĻ āĻĄিāĻাāĻāĻ āĻā§°ু āύেāĻā§ąā§°্āĻ āĻ ংāĻļ āĻšোā§ąা āĻĄāĻŽেāĻāύāϞৈ āĻāĻুāϞিāϝ়াāϝ়। āĻŦ্āϝাāĻ্āϝা: āĻāĻāĻĒি āĻ িāĻāύাāύেāĻā§ąā§°্āĻ āĻļাāĻাāϞৈ āĻāĻুāϞিāϝ়াāϝ় āϝ'āϤ āĻāĻ āĻৌāϤিāĻ āĻšাā§°্āĻĄā§ąেā§° āĻ ংāĻļ। āĻāϤিāĻে āĻāĻŽ্āĻĒিāĻāĻাā§° āύেāĻā§ąā§°্āĻāϤ āĻāĻŽ্āĻĒিāĻāĻাā§° āĻāĻা āĻিāύাāĻ্āϤ āĻā§°িāĻŦāϞৈ āĻŦ্āĻ¯ā§ąāĻšাā§° āĻā§°া āĻāĻিāϤ āύāĻšāϝ়।)
3. Give five examples of valid and five examples of invalid IPv4 addresses. (Hint: Each segment of an IPv4 address has a fixed length)
āĻŦৈāϧ IPv4 āĻ িāĻāύাā§° āĻĒাঁāĻāĻা āĻāĻĻাāĻšā§°āĻŖ āĻā§°ু āĻ āĻŦৈāϧ IPv4 āĻ িāĻāύাā§° āĻĒাঁāĻāĻা āĻāĻĻাāĻšā§°āĻŖ āĻĻিāϝ়āĻ। (āĻংāĻিāϤ: āĻāĻা IPv4 āĻ িāĻāύাā§° āĻĒ্ā§°āϤিāĻো āĻāĻŖ্āĻĄā§° āĻāĻা āύিā§°্āĻĻিāώ্āĻ āĻĻৈā§°্āĻ্āϝ āĻĨাāĻে)
Ans: Five examples of valid addresses 172.16.254.2,192.168. 01.1,192.168. 1.00,
4. Can we compare HTTP and FTP protocols? Mention their functionality.
āĻāĻŽি HTTP āĻā§°ু FTP āĻĒ্ā§°āĻোāĻāϞāϏāĻŽূāĻš āϤুāϞāύা āĻā§°িāĻŦ āĻĒাā§°োāύে? āϤেāĻঁāϞোāĻā§° āĻাā§°্āϝ্āϝāĻ্āώāĻŽāϤাā§° āĻāĻĨা āĻāϞ্āϞেāĻ āĻā§°āĻ।
Ans: HTTP provides support for out-band type transfer. FTP provides support for an in-band type transfer. We use the FTP to download as well as upload files between servers and customers on the internet. We use HTTP to provide various web pages from web browsers to web servers.
5. How many 16 port switches are required to connect 31 computers in a network? (Hint: To connect all computers, all switches also should be connected among themselves)
āĻāĻা āύেāĻā§ąā§°্āĻāϤ ā§Šā§§āĻা āĻāĻŽ্āĻĒিāĻāĻাā§° āϏংāϝোāĻ āĻā§°িāĻŦāϞৈ āĻিāĻŽাāύāĻা ā§§ā§ŦāĻা āĻĒā§°্āĻ āĻুāĻāĻā§° āĻĒ্ā§°āϝ়োāĻāύ? (āĻংāĻিāϤ: āϏāĻāϞো āĻāĻŽ্āĻĒিāĻāĻাā§° āϏংāϝোāĻ āĻā§°িāĻŦāϞৈ, āϏāĻāϞো āĻুāĻāĻো āύিāĻā§° āĻŽাāĻāϤে āϏংāϝোāĻ āĻā§°িāĻŦ āϞাāĻে)
Answer: To connect 31 computers, ideally, if no switch-to-switch connections were required, you would need
switches, as each switch has 16 ports.Internet (āĻāĻŖ্āĻাā§°āύেāĻ)