CBSE :: XII :: INFORMATION PRACTICES
UNIT 3 :: INTRODUCTION TO NETWORKS
OLD CBSE QUESTIONS & ANSWERS
(10 Marks)
Unit 3: Introduction to Networks - Syllabus
Introduction to networks, Types of network: LAN, MAN, WAN.
Network Devices: modem, hub, switch, repeater, router, gateway
Network Topologies: Star, Bus, Tree, Mesh.
Introduction to Internet, URL, WWW, and its applications- Web, email, Chat, VoIP.
Website: Introduction, difference between a website and webpage, static vs dynamic web page, web server and hosting of a website.
Web Browsers: Introduction, commonly used browsers, browser settings, add-ons and plug-ins, cookies.
2022.23 ::CBSE Sample Paper::Questions
1. Television cable network is an example of:
i. LAN ii. WAN iii. MAN iv. Internet
13. Which amongst the following is not an example of a browser?
i. Chrome ii. Firefox iii. Avast iv. Edge
Q.17 and 18 are ASSERTION AND REASONING based questions.
Mark the correct choice as
i. Both A and R are true and R is the correct explanation for A
ii. Both A and R are true and R is not the correct explanation for A
iii. A is True but R is False
iv. A is false but R is True
17. Assertion (A): - Internet cookies are text files that contain small pieces of data, like a username, password and user’s preferences while surfing the internet.
Reasoning (R):- To make browsing the Internet faster & easier, its required to store certain information on the server’s computer.
19. Explain the terms Web page and Home Page.
OR
Mention any four networking goals.
32. Prime Computer services Ltd. is an international educational organization. It is planning to set up its India campus at Mumbai with its head office in Delhi. The Mumbai office campus has four main buildings-ADMIN, ACCOUNTS, EXAMINATION and RESULT.
You as a network expert have to suggest the best network related solutions for their problems raised in (i) to (v), keeping in mind the distances between the buildings and other given parameters.
Shortest distances between various buildings:
Number of computers installed at various buildings are as follows:
(i) Suggest the most appropriate location of the server inside the MUMBAI campus (out of the four buildings) to get the best connectivity for maximum number of computers. Justify your answer.
(ii) Suggest and draw cable layout to efficiently connect various buildings within the MUMBAI campus for a wired connectivity.
(iii) Which networking device will you suggest to be procured by the company to interconnect all the computers of various buildings of MUMBAI campus?
(iv) Company is planning to get its website designed which will allow students to see their results after registering themselves on its server. Out of the static or dynamic, which type of website will you suggest?
(v) Which of the following will you suggest to establish the online face to face communication between the people in the ADMIN office of Mumbai campus and Delhi head office?
a) Cable TV b) Email c) Video conferencing d) Text chat
2022.23 ::CBSE Sample Paper::Answers
1. iii. MAN
13. iii. Avast
17. iii. A is True but R is False
19. Web Page: A Web Page is a part of a website and is commonly written in HTML. It can be accessed through a web browser.
Home Page: It is the first web page you see when you visit a website.
OR
Four networking goals are:
i. Resource sharing ii. Reliability
iii. Cost effective iv. Fast data sharing
32. i. Server should be installed in Admin department as it has maximum number of computers.
ii.
Star topology
iii. Hub/Switch
iv. Dynamic
v. Video conferencing
2021.22 ::CBSE Board Paper::Term 2 (Questions)
1. Rishil thought “WWW” and “Internet” are synonyms i.e., they meant same and can be used interchangeably. But the teacher said that they are not same. Help him to understand the meaning of both the terms with the help of a suitable example for each. (2)
Or
What are cookies? How can we disable cookies?
2. (i) What is the function of Gateway? (1)
(ii) Give examples of two Plug-ins (1)
4. Give one advantage and disadvantage each of Bus and Star topology. (2)
13. ABC international school, Delhi has different wings Administrative Wing (W1), Primary
Wing(W2), Middle Wing(W3) and Secondary Wing(W4) as shown in the diagram: (4)
The school also has a branch in Mumbai.
The school management wants to connect all the wings as well as all the computers of each wing (W1,W2,W3,W4).
Based on the above specifications, answer the following questions:
(i) Suggest the topology and draw the most suitable cable layout for connecting all the wings of Delhi branch.
(ii) Suggest the kind of network required (out of LAN, MAN, WAN) for connecting
(a)Administrative Wing(W1) with Middle Wing(W3)
(b)Administrative Wing(W1) with the Mumbai branch.
(iii) Suggest the placement of the following devices with justification:
a. Repeater b. Hub
(iv) Due to pandemic school had to adopt Online class. Suggest the protocol that is used for sending the voice signals over the internet. Also give an example of an application of WWW that helped the teachers to send messages instantly to the students.
2021.22 ::CBSE Board Paper::Term 2 (Answers)
1. Ans:
Internet | WWW |
Internet is primarily hardware based | World Wide Web(WWW) is primarily software based |
Internet is networking infrastructure that connects devices together | WWW is collection of information that can be access through internet |
Internet uses TCP/IP for communication | WWW uses HTTP/HTTPS for communication |
Or
Process to disable cookies:
One can disable cookies by changing the Privacy and Security settings of our browser.
2. (i) A gateway is a device that connects dissimilar networks. A gateway is a device that connects the organisation’s network with the outside world of the internet. Gateway serves as the entry and exit point of a network, as all data coming in or going out of a network must first pass through the gateway in order to use routing paths.
ii) Adobe Flash, Java, QuickTime, Shockwave, Silverlight
4. Bus topology Advantages:
Bus topology disadvantage:
Star topology advantages:
Star topology Disadvantages:
13. (i)
(From wing in server to all other wings)
(Less cable length)
(ii) (a) LAN (b) WAN
(iii) a. Repeater : As per cable Layout-1, Repeater can be placed between W1 and W4 wing, also between W1 and W3 wing. As per cable Layout-2, Repeater can be placed between W1 and W3 wing.
b. Switch/Hub: We can place Switch/Hub in all the Wings to connect all computers.
(iv) Protocol : VOIP
Application : Google Meet/Microsoft Teams/Zoom, etc
2021.22 ::CBSE SP::Term 2 (Questions)
1. Aman, a freelance web site developer, has been assigned a task to design few web pages for a book shop. Help Aman in deciding out of static web page and dynamic web page, what kind of web pages should be designed by clearly differentiating between static and dynamic web pages on at least two points
Or
Priyanka, a beginner in IT field has just started learning web technologies. Help her in understanding the difference between website and web pages with the help of a suitable general example of each.
2.i) I : (1)
2.ii) Name any two popular web browsers. (1)
4) Navya has just created a website for her company and now need to host it. Briefly discuss the role of a web server in hosting a website. (2)
13) “Anutulya Creations”-A start-up fashion house has set up its main centre at Kanpur, Uttar Pradesh for its dress designing, production and dress supplying activities. It has 4 blocks of buildings. (4)
Distance between the various blocks is as follows:
A to D 50 m
A to P 60 m
A to S 110m
D to S 60m
P to S 50m
P to D 150m
Numbers of computers in each block:
Block A - 20
Block D - 80
Block P - 15
Block S - 8
Based on the above specifications, answer the following questions:
(a) Out of LAN, WAN and MAN, what type of network will be formed if we interconnect different computers of the campus? Justify.
(b) Suggest the topology which should be used to efficiently connect various blocks of buildings within Kanpur centre for fast communication.
Also draw the cable layout for the same.
(c) Suggest the placement of the following device with justification i. Repeater ii. Hub/Switch
(d) Now a day, video-conferencing software is being used frequently by the company to discuss the product details with the clients. Name any one video conferencing software.
Also mention the protocol which is used internally in video conferencing software.
2021.22 ::CBSE SP::Term 2 (Answers)
1. Differentiation between static and dynamic web pages:
Static Web Page | Dynamic Web Page |
1. Content of this type of webpage cannot be changed at run time. | 1. Content of this type of webpage can be changed at run time. |
2. No interaction with server’s database is possible in case of static web pages. | 2.Interaction with server’s database is possible in case of dynamic web pages. |
2.i) Cookies
2.ii) Mozilla Firefox, Google Chrome (OR) Any other correct name
4) Role of web server in hosting a website:
A web server is the main centralized computer system that hosts and runs the websites. It has a computer program that distributes web pages as they are requisitioned. The basic role of the web server is to store, process and deliver the web pages to the users as and when required.
13. (a) LAN (As computers are placed with-in the same campus with-in a small range.)
(b) Star topology
Cable Layout:
c) i. Repeater should be placed in between Block ‘D’ (Design) and Block ‘P’ as distance is
more.
ii. Hub/Switch should be placed in each building to connect various computers together.
d) Video Conferencing software: Teams, Zoom, Skype etc. (Any one)
Protocol of Video Conferencing software: VOIP
2020.21 ::CBSE SP::(Questions)
7. To prevent unauthorized access to and / or from the network, a system known as ____________, can be implemented by hardware and / or software. (1)
9. Which of the following is not a network topology: Star, Mesh , Tree, Bug , Bus (1) 10. For web pages where the information is changed frequently, for example, stock prices,
weather information which out of the following options would you advise ? (1)
a) Static web page b) Dynamic web page
Justify your answer.
14. I can keep you signed in. (1)
I can remember your site preferences.
I can give you locally relevant content.
Who am I ?
15. Which amongst the following is not an example of browser ? (1)
a. Chrome b. Firefox c. Avast d. Edge
16. A mail or message sent to a large number of people indiscriminately without their consent is called____________ (1)
20. _________________ network device is known as an intelligent hub . (1)
21. Receiving irreleavnt and unwanted emails repeatedly is an example of _______. (1)
31. Expand the following terms related to Computer Networks:
a. SMTP b. POP c. FTP d. VoIP (2)
33. Priyanka is using her internet connection to book a flight ticket. This is a classic example of leaving a trail of web activities carried by her. What do we call this type of activity? What is the risk involved by such kind of activity? (2)
40. A company in Mega Enterprises has 4 wings of buildings as shown in the diagram : (5)
Computers in each wing are networked but wings are not networked The company has now decided to connect the wings also.
i. Suggest a most suitable cable layout for the above connections.
ii. Suggest the most appropriate topology of the connection between the wings.
iii. The company wants internet accessibility in all the wings. Suggest a suitable technology .
iv. Suggest the placement of the following devices with justification if the company wants minimized network traffic
a)Repeater b)Hub / switch
v. The company is planning to link its head office situated in New Delhi with the offices in hilly areas. Suggest a way to connect it economically.
2020.21 ::CBSE SP::(Answers)
7. Firewall
9. Bug
10. Dynamic Web Page
14. Cookies
15. c. Avast
16. Spam
20. Switch
21. Spam (or) spamming
31. a. SMTP: Simple Mail Transfer Protocol
b. POP: Point to Point Protocol
c. FTP: File Transfer Protocol
d. VoIP: Voice over Internet Protocol
33. We call this type of activity as Digital Footprints
Risk involved : It includes websites we visit emails we send, and any information we submit online,etc., along with the computer’s IP address, location, and other device specific details. Such data could be used for targeted advertisement or could also be misused or exploited.
40. i) Most suitable layout according to distance is :
ii) Star Topology
iii) Broadband.
iv) a. Not required. Repeaters may be skipped as per above layout (because distance is
less than 100 m)
b. In every wing
iv) Radio Waves
Note : No Questions in 2019.20 Paper.(Syllabus differ)