Important Questions for Class 12 Computer Science (C++) – Communication Technologies (Part 2)

 Question 46:

Name any two components required for networking. Delhi 2011C
Аnswer:
Switch/Hub and Repeaters.

Question 47:
What is repeater? Delhi 2011C
Аnswer:
Repeater is an electronic device, that receives a signal and retransmits it at a higher level so that the signal covers longer distance. It’s required if the distance between source and destination is 90 m or more.

Question 48:
What was the role of ARPANET in the computer network? Delhi; All India 2010
Аnswer:
ARPANET (Advanced Research Projects Agency Network). The goal of this project was to connect computers at different universities and US defence.
ARPANET started with a handful of computer but it expanded rapidly.

Question 49:
Which of the following is not an unit for data transfer rate?

1. Bps
2. Abps
3. Gbps
4. Kbps Delhi 2010

Аnswer:
(ii) Abps is not unit for data transfer rate.

Question 50:
What is the difference between trojan horse and virus in terms of computers? Delhi 2010
Аnswer:
Unlike viruses, trojan horse do not replicate themselves but they can be just a lot destructive. One of the most insidious type of trojan is a program that claims to rid your computer of viruses but instead introduce viruses onto your computer.

Question 51:
What term we use for a software/ hardware device, which is used to block, unauthorised access while permitting authorised communications. This term is also used for a device or set of devices configured to permit, deny, encrypt, decrypt, or proxy all (in and out) computer traffic between different security domains based upon a set of rules and other criteria. Delhi; All India 2010
Аnswer:
Firewall

Question 52:
Write the full forms of the following:

1. GNU
2. XML Delhi 2010

Аnswer:

1. GNU GNU’S NOT UNIX
2. XML extensible Markup Language

Question 53:
Which of the following is not an unit for data transfer rate?

1. Mbps
2. Kbps
3. Sbps
4. Gbps Delhi 2011

Аnswer:
(iii) Sbps

Question 54:
What is the difference between virus and worm in the computer? All India 2010
Аnswer:
The main difference between virus and worm is the method by which they reproduce and spread. A virus is dependent upon a boot sector and the transfer of files between machines to spread, while a worm can run completely independently and spread itself through network connections.

Question 55:
Write the full form of the following:

1. FTP
2. FSF All India 2010

Аnswer:

1. FTP File Transfer Protocol
2. FSF Free Software Foundation.

Question 56:
Name any two common web browsers. All India 2010
Аnswer:
Google Chrome and Internet Explorer.

Question 57:
What is protocol? Which protocol is used to search information from Internet using an Internet browser? Delhi 2009
Аnswer:
Protocol is a set of rules that two or more computers must follow in order to communicate on network. HTTP (HyperText Transfer protocol) is used for searching information from Internet using Internet browser.

Question 58:
Name two switching techniques used to transfer data between two terminals (computers). Delhi; All India 2009
Аnswer:
Switching techniques used to transfer data between two terminals :

1. Circuit switching
2. Packet switching

Question 59 :
Expand the following abbreviations

1. HTTP
2. ARPANET All India 2009

Аnswer:

1. HTTP HyperText Transfer Protocol
2. ARPANET Advanced Research Projects Agency Network

Question 60:
What is protocol? Which protocol is used to copy a file from/to a remotely server ? All India 2009
Аnswer:
Protocol is a set of rules that two or more computers should follow in order to communicate on network. FTP (File Transfer Protocol) is used to copy a file from/to a remotely located server.

Question 61:
Expand the following terminologies

1. GSM
2. WLL Delhi 2009 (C)

Аnswer:

1. GSM Global System for Mobile Communication,
2. WLL Wireless Local Loop.

Question 62:
Distinguish between Website and Web browser. Delhi 2009 (c)
Аnswer:
Website is a collection of related Web pages served from a single Web domain while Web browser is a software that is used to access and display the Web pages.

Question 63:
What is firewall? Delhi 2009 (C)
Аnswer:
Firewall is a security system that prevents an unauthorised access to a private network. Firewalls can be implemented in both hardware and software or combination of both.

2 Marks Questions

Question 64:
Differentiate between communication using Optical Fibre and Ethernet Cable in context of wired medium of communication technologies. All India 2017
Аnswer:
Differences between Optical Fibre and Ethernet Cable are as follows :

Question 65:
Janish Khanna used a pen drive to copy files from his friend’s laptop to his office computer. Soon his computer started abnormal functioning. Sometimes it would restart by itself and sometimes it would stop different applications running on it. Which of the following options out of (i) to (iv), would have caused the malfunctioning of the computer? Justify
the reason for your chosen option: All India 2017

1. Computer Virus
2. Spam Mail
3. Computer Bacteria
4. Trojan Horse

Аnswer:
(i) Computer virus
Reason Computer virus can spread through external media such as CDs, pen drive etc. It is designed to infect the host program and gain control over the system without the owner’s knowledge.

Question 66:
Ms. Raveena Sen is an IT expert and a freelancer. She recently used her skills to access the Admin password for the network server of Super Dooper Technology Ltd. and provided confidential data of the organisation to its CEO, informing him about the vulnerability of their network security. Out of the following options (i) to (iv), which one most appropriately defines Ms. Sen? All India 2017
Justify the reason for your chosen option:

1. Hacker
2. Cracker
3. Operator
4. Network Admin

Аnswer:
(ii) Cracker
Reason Crackers are generally responsible for breaking into networks, cracking passwords in websites and programs and generally causing havoc through the Internet.

Question 67:
Write any two differences between twisted pair and coaxial pair cable. All India (C)2014
Аnswer:
Two differences between twisted pair and coaxial pair cable are as follows :

Question 68:
Give the full form of the following terms :

1. XML
2. FLOSS
3. HTTP
4. FTP Delhi 2011(c)

Аnswer:

1. XML extensible Markup Language
2. FLOSS Free Libre and Open Source Software
3. HTTP HyperText Transfer Protocol
4. FTP File Transfer Protocol

4 Marks Questions

Question 69:
Hi Standard Tech Training Ltd. is a Mumbai based organisation which is expanding its office set-up to Chennai. At Chennai office compound, they are planning to have 3 different blocks for Admin, Training and Accounts related activities. Each block has a number of computers, which are required to be connected in a network for communication, data and resource sharing.

As a network consultant, you have to suggest the best network related solutions for them for issues/problems raised by them in (i) to (iv), as per the distances between various blocks/locations and other given parameters.

1. Suggest the most appropriate block/location to house the SERVER in the CHENNAI office (out of the 3 blocks) to get the best and effective connectivity. Justify your answer.
2. Suggest the best wired medium and draw the cable layout (Block to Block) to efficiently connect various blocks within the CHENNAI office compound.
3. Suggest a device/software and its placement that would provide data security for the entire network of the CHENNAI office.
4. Suggest a device and the protocol that shall be needed to provide wireless Internet access to all smartphone/laptop users in the CHENNAI office. All India 2017

Аnswer:

(i) Training Block is the most appropriate block/location to house the SERVER in the CHENNAI office to get the best and effective connectivity because it has maximum number of computers.

(iii) Suggested device is firewall. And it will be placed where all messages are entering or leaving the entire network of the CHENNAI office.
(iv) Device: WiFi card
Protocol: TCP/IP

Question 70:
Uplifting Skills Hub India is a knowledge and skill community which has an aim to uplift the standard of knowledge and skills in the society. It is planning to set-up its training centers in multiple towns and villages pan India with its head offices in the nearest cities. They have created a model of their network with a city, a town and 3 villages as follows. As a network consultant, you have to suggest the best network related solutions for their issues/problems raised in (i) to (iv) keeping in mind the distances between various locations and other given parameters.

NOTE : In Villages, there are community centers, in which one room has been given as training center to this organisation to install computers.
The organisation has got financial support from the government and top IT companies.

1. Suggest the most appropriate location of the SERVER in the B_HUB (out of the 4 locations), to get the best and effective connectivity. Justify your answer.
2. Suggest the best wired medium and draw the cable layout (location to location) to efficiently connect various location within the B_HUB.
3. Which hardware device will you suggest to connect all the computers within each location of B_HUB?
4. Which service/protocol will be most helpful to conduct live interactions of Experts from Head Office and people at all locations of B_HUB? Delhi 2016

Аnswer:
(i) B_TOWN is the most appropriate location of the server inside the B_HUB because it has maximum number of computers.

Ethernet cable is the best wired medium to connect the various locations within the B HUB.
(iii) Switch
(iv) Telnet

Question 71:
Intelligent Hub India is a knowledge community aimed to uplift the standard of skills and knowledge in the society. It is planning to set-up its training centers in multiple towns and villages pan India with its head offices in the nearest cities.
They have created a model of their network with a city, a town and 3 villages as follows.
As a network consultant, you have to suggest the best network related solutions for their issues/problems raised in (i) to (iv), keeping in mind the distance between various locations and other given parameters.

NOTE In Villages, there are community centers, in which one room has been given as training center to this organisation to install computers. The organisation has got financial support from the government and top IT companies.

1. Suggest the most appropriate location of the SERVER in the YHUB (out of the 4 locations), to get the best and effective connectivity. Justify your answer.
2. Suggest the best wired medium and draw the cable layout (location to location) to efficiently connect various locations within the YHUB.
3. Which hardware device will you suggest to connect all the computers within each location of YHUB?
4. Which service/protocol will be most helpful to conduct live interactions of Experts from Head Office and people at YHUB locations? All India 2016

Аnswer:

(i) YTOWN is the most appropriate location of the server inside the YHUB because it has maximum number of computers.

Ethernet cable is the best wired medium to connect the various locations within the YHUB.
(iii) Switch
(iv) Telnet

Question 72:
Perfect Edu Services Ltd. is an educational organisation. It is planning to set-up its India campus at Chennai-with its head office at Delhi. The chennai campus has 4 main buildings-ADMIN, ENGINEERING, BUSINESS and MEDIA.
You as a network expert have to suggest the best network related solutions for their problems raised in
(i) to (iv), keeping in mind the distance between the buildings and other given parameters.

1. Suggest the most appropriate location of the server inside the CHENNAI campus (oof the 4 buildings), to get the best connectivity for maximum number of computers. Justify your answer.
2. Suggest and draw the cable layout to efficiently connect various buildings within the CHENNAI campus for connecting the computers.
3. Which hardware device will you suggest to be procured by the company to be installed to protect and control the Internet uses within the campus?
4. Which of the following will you suggest to establish the online face-to-face communication between the people in the Admin Office of CHENNAI campus and DELHI Head Office?
   (a) Cable TV
   (b) E-mail
   (c) Video Conferencing
   (d) Text Chat Delhi 2018

Аnswer:

(i) ADMIN is the most appropriate location of the server inside the CHENNAI campus because it has maximum number of computers.

(iii) Firewall
(iv) (c) Video Conferencing

Question 73:
Xcelencia Edu Services Ltd. is an educational organisation. It is planning to set-up its India campus at Hyderabad with its head office at Delhi. The Hyderabad campus has 4 main buildings -ADMIN, SCIENCE, BUSINESS and ARTS. You as a network expert have to suggest the best network related solutions for their problems raised in (i) to (iv), keeping in mind the distances between the buildings and other given parameters.

1. Suggest the most appropriate location of the server inside the HYDERABAD campus (out of the 4 buildings), to get the best connectivity for maximum number of computers. Justify your answer.
2. Suggest and draw the cable layout to efficiently connect various buildings within the HYDERABAD campus for connecting the computers.
3. Which hardware device will you suggest to be procured by the company to be installed to protect and control the Internet uses within the campus?
4. Which of the following will you suggest to establish the online face-to-face communication between the people in the Admin Office of HYDERABAD campus and DELHI Head Office?
   (a) E-mail
   (b) Text Chat
   (c) Video Conferencing
   (d) Cable TVAII India 2015

Аnswer:

(i) ADMIN is the most appropriate location of the server inside the HYDERABAD campus because it has maximum number of computers.

(iii) Firewall
(iv) Videoconferencing

Question 74:
Trine Tech Corporation (TTC) is a professional consultancy company. The company is planning to set-up their new offices in India with its hub at .Hyderabad. As a network adviser, you have to understand their requirement and suggest them the best available solutions. Their queries are mentioned as (i) to (iv) below.
Physical locations of the blocks of TTC

1. What will the most appropriate block, where TTC should plan to install their server?
2. Draw a block to block cable layout to connect all the buildings in the most appropriate manner for efficient
   communication.
3. What will be the best possible connectivity out of the following, you will suggest to connect the new set-up of offices in Bangalore with its London based office.
   • Satellite Link
   • Infrared
   • Ethernet
4. Which of the following device will be suggested by you to connect each computer in each of the buildings?
   • Switch
   • Modem
   • Gateway Delhi 2014

Аnswer:

(i) TTC should install its server in Finance Block because it has maximum number of computers.

(iii) Satellite Link
(iv) Switch

Question 75:
Tech Up Corporation (TUC) is a professional consultancy company. The company is planning to set-up their new offices in India with its hub at Hyderabad. As a network adviser, you have to understand their requirement and suggest to them the best available solutions. Their queries are mentioned as (i) and (iv) below. You have to understand their requirement and suggest to them the best available solutions. Their queries are mentioned as (i) and (iv) below.

1. What will the most appropriate block, where TUC should plan to install their server?
2. Draw a block to block cable layout to connect all the buildings in the most appropriate manner for efficient communication.
3. What will be the best possible connectivity out of the following, you will suggest to connect the new set-up of offices in Bangalore with its London based office?
   • Infrared
   • Satellite Link
   • Ethernet Cable
4. Which of the following devices will be suggested by you to connect each computer in each of the buildings?
   • Gateway
   • Sqwitch
   • Modem All India 2014

Аnswer:

(i) TUC should install its server in Human Resource Block as it is having maximum number of computers.

(iii) Satellite Link
(iv) Swatch