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Class X Previous Year 2nd Unit Examination Question Papers

Class 10 | Chapter 1 | Computer Science | INTRODUCTION TO COMPUTER NETWORKS

SEBA Class 10 Computer Science Solutions – 2025


 Chapter 1 | Computer Science 

INTRODUCTION TO COMPUTER NETWORKS


1. What is a computer network?

Ans: a computer network is a set of computers and other units that are connected with each other. In a computer network information or resources can be shared among connected computers.


2. Write some example of wired technology.

Ans: coaxial cable, twisted pair cable, optical fibre cable etc.


3. Write some examples of wireless technologies?

Ans: Bluetooth, Wi-Fi, WiMAX, etc.


4. Write the full form of the following

PAN, LAN, MAN, WAN

Ans: PAN- Personal Area Network.

LAN - Local Area Network.

MAN- Metropolitan Area Network.

WAN -Wide Area Network.


5. Based on their connecting technology how many types of computer networks are there?

Ans: based on the connecting technology a computer network can be classified as wired wireless or hybrid network.


6. What is personal area network?

Ans: Personal Area Network networks are normally set up for individual use within a limited geographical range. In normal circumstances personal area network offers a network range of about 10 m from Central device to the other communicating devices.

For example someone can set up a personal area network between his laptop and other electronic gadgets like a smartphone.


7. What is a local area network?

Ans: In local area network a number of units are connected to each other in a small area such as building office etc with the help of a common communication path like a switch or a similar connecting device. This type of network systems are used in banks, cyber cafes or schools etc.


8. What is Metropolitan Area Network?

Ans: MAN or Metropolitan area networks are normally spread over in entire City or white geographic location. A Metropolitan area network does not have to be in urban areas only. The term Metropolitan implies the size of the computer network not the class or type of the area that it serves. A Metropolitan Area Network is formed by interconnecting multiple LAN's that are within a limited geographic area. MANs typically Marge the networks of multiple organisations to establish communication among them or to share common resources.


9. What is Wide Area Network ?

Ans: white area networks are formed by connecting devices from multiple locations across the globe. Wide area networks are often established with leased telecommunication circuits. In comparison to a Metropolitan Area Network wide area network is wider with respect to geographical location.


10. What is leased telecommunication circuit?

Ans: leased telecommunication circuits is a communication line between two or more locations functioning according to a commercial contract.


11. What is hostname?

Ans: The host name is the name of a computer or any connected device in a computer network. It is also known as computer name.


12. What is an internet protocol address or IP address?

Ans: an internet protocol address is a numerical level that is assigned to network devices to identify them uniquely. IP addresses are unique identifiers of a computer in a computer network.


13. How many types of Internet protocol address and what are they?

Ans: there are two types of IP addresses a) internet protocol version 4 (IPv4) and b) internet protocol version 6 (IPv6).


14. What is the use of IP addresses?

Ans: IP addresses uniquely identify devices on a network, enabling communication by acting as a digital address, similar to a physical address for internet devices. They are essential for devices to send and receive data across networks, including the internet.


15. What is MAC address?

Ans: media access control address for MAC address is a unique identifier assigned to a network interface controller. Mac addresses are also called burned in addresses or Ethernet hardware addresses or Ethernet physical addresses.


16. What is a network interface card?

Ans: a network interface card is a hardware component that is used to connect a computer to a computer network. Network interface cards are also called network adaptors or LAN adaptors.


17. What is hub?

Ans: I have is a networking device that connects other computer networking devices together. When is signal tribes a long distance the strength of the signal decreases gradually. In such a situation a how can we used to act as a repeater which amplifies signals that deteriorate after travelling longistances over connecting cables.


18. What is switch?

Ans: a switch is also a networking device that connects other computer networking devices. A switch is a multiport device. A switch maintenance Sam routing information about Aadhar network devices in the internal network.


19. What is a router?

Ans: router is a type of network device which are used to interconnect two or more heterogeneous computer networks. A router can be considered as a small computer that is usually dedicated to special purpose with multiple input and output network interfaces.


20. Write the full form of SSID.

Ans: Service set identifier.


21. What is SSID?

Ans: A Service Set Identifier or SSID is a sequence of characters that refers to a wireless local area network.


22. Write the full form of TCP, IP, POP, SMTP, HTTP, HTTPS.

Ans: TCP- Transmission Control Protocol ,

IP-Internet Protocol ,

POP- Post Office Protocol.

SMTP - Simple Mail Transfer Protocol.

http- Hypertext Transfer Protocol,

https- Hypertext Transfer Protocol Secure.


23. What do you mean by HTTP and HTTPS?

Ans: The HTTP protocol is the foundation of the World Wide Web which is used for fetching web resources such as HTML Documents or other web pages. HTTP is a client server protocol. 

HTTPS is a combination of the hypertext transfer protocol with added security features by looking at the uniform resource locator or URL in the web address bar of your browser you can easily identify whether you are browsing using http or https. 


24. What is the difference between http and https?

Ans: The main difference between http and https is ----

In an HTTP communication data are sent without encryption. But in https data are sent after encryption. Encryption is the process of converting information to our data into a code to prevent unauthorised access.


25. Write a disadvantage of FTP protocol.

Ans: the main disadvantage of FTP protocol is that eat does not encrypt username password and data when login in to the server and data transfer.


26. What is the function of 'ping' command?

Ans: 'Ping' command is used to verify the connectivity between two computers. The syntex of the command is ping<target host> .


27. Why ipconfig command is used?

Ans: the ipconfig command is used to determine a computer's networking information such as the IP address address of its default gateway etc.


28. Write the difference between internet protocol version 4 and internet protocol version 6.

Ans:  The difference between Internet Protocol Version 4 and Internet Protocol Version 6 are: 



29. Write the function of DHPC server?
Ans: DHPC server maintains a pool of IP addresses and based on a request it assigns an IP address from the pull to a computer. To acquire an automatic IP address there should be a DHPC server in the network.


30. How MAC addresses become Globally unique? 
Ans: MAC address is assigned by hardware manufacturers and a user cannot modify it. A media access control address or MAC address is composed of 12 hexa decimal digits. out of which the group of first 6 hexa decimal digits is called OUI or organisational unique identifier. A Globally recognise committee IEEE registration authority committee assigns unique OUI to hardware manufacturers to see it as a prefix of Mac address. The uniqueness of the remaining 6 hexadecimal digits is maintained by each manufacturer individually does Mac addresses become globally unique.

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Important notes. 
* PAN's ownership is private.

* Personal area network offers network range of about 10 m from a central device. 

* Internet is an example of Wide Area Network or WAN.

* NIC is the part where the network cable physically connects. 

* MAC addresses cannot be changed by a user.

* MAC addresses is composed for 12 hexadecimal digits.

* Network interface cards are also called network adaptors or LAN adaptors.

* The main functionality of the access point is to provide wireless network connectivity. 

* In an http communication data sent without encryption. 

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EXERCISE

I. FILL IN THE BLANKS:

1. The hostname command is used to display_____.

Ans. Name of the computer.


2. The length of a IPv4 and a IPv6 is____and___.

Ans. 32 bit; 128 bit.


3. An access point is used to connect_____.

Ans. Wireless network.


4. The ping command is used to verify____.

Ans. The connectivity between two computers.


5. HTTPS transfer______data.

Ans. Encrypted.


II. MULTIPLE CHOICE QUESTIONS:

1. Which device is required to connect multiple heterogeneous networks?

(A) Hub                 (B) Switch            (C) Router           (D) Access Point

Ans. (C) Router.


2. Which is the largest type of computer network?

(A) PAN                (B) LAN                 (C) MAN               (D) WAN

Ans. (D) WAN.


3. Which protocol transfers encrypted data instead of plain data?

(A) HTTP               (B) HTTPS             (C) FTP                  (D) SMTP

Ans. (B) HTTPS.


4. How many bytes are reserved for OUI in a MAC address?

(A) 3                       (B) 8                       (C) 24                     (D) 12

Ans. (C) 24.


5. IP address can be automatically assigned if the network is connected with

(A) Access Point                (B) Mail Server                  (C) Web Server                 (D) DHPC Server

Ans. (D) DHPC Server.


III. SHORT ANSWER QUESTIONS:

1. Mention the names of components required to set up a MAN network. Draw a block diagram of a MAN network labeling the name of each component.

Ans. Computer network components are the major parts which are needed to install the software. Some important network components are a Network Interface card, Router, HUB, Switch, Repeater, Bridge, server, and Modem.



2. Why hostname should not be used to identify a computer in a computer network?

Ans. Hostname is not a reliable way to identify a computer network because a hostname can be changed easily, and multiple hosts can have the same hostname. Additionally, a single host can have multiple network interfaces, each with a different hostname.


3. Give five examples of valid and five examples of invalid IPv4 addresses.

Ans. A valid IPv4 address must be in the form of A.B.C.D, where A, B, C, and D are numbers from 0-255.

Valid IPv4 Addresses:

192.168.0.1

192.158.1.1

10.0.0.1

255.255.255.255

0.0.0.0

Invalid IPv4 Addresses:

192.168.1.256 (256 is outside the 0-255 range)

192.168.1.00 (leading zero in a number)

192.168.1.1.1 (too many numbers)

192.168.1a.1 (letters are not allowed)

255.255.255.267 (267 is outside the 0-255 range)


4. Can we compare HTTP and FTP protocols? Mention their functionality.

Ans. HTTP is used to transfer web pages between a client and a server while FTP is used to transmit files among different hosts.

Comparison between HTTP and FTP:

Sl No

HTTP

FTP

1

HTTP is Hyper Text Transfer Protocol

FTP is a File Transfer Protocol.

2

It is the set of rules that how web pages are transferred on different  computers over the internet.

It is the set of rules that permit the downloading and uploading the files on the computer over the internet.

3

We use HTTP for providing various web pages from the web browser to the web server.

The URLs that use the HTTP protocol begin with HTTP.

4.

HTTP does not require authentication.

FTP requires a password.

 

5. How many 16 port switches required to connect 31 computers in a network?

Ans. A 16-port switch can connect 16 computers together. To connect 31 computers in a network, we need either a larger switch or 2 numbers of 16 port switches.

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SEBA Class 10 Computer Science Solutions

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