Students can read the important questions given below for Computer network Class 12 Computer Science. All Computer network Class 12 Notes and questions with solutions have been prepared based on the latest syllabus and examination guidelines issued by CBSE, NCERT and KVS. You should read all notes provided by us and Class 12 Computer Science Important Questions provided for all chapters to get better marks in examinations. Computer Science Question Bank Class 12 is available on our website for free download in PDF.
Important Questions of Computer network Class 12
Short Answer Type Questions :
Question. Which device is used to connect dissimilar networks?
Ans. A gateway is a device, which is used to connect dissimilar networks. The gateway establishes an intelligent connection between a local network and external network, which are completely different in structure. Gateway also serve as proxy server and a firewall system that prevents the unauthorised access.
Question. Explain wireless technology and give a brief note on the following
(i) Bluetooth
(ii) Radiowave
Ans. Wireless technology is also known as unguided media. This media does not use any wires or cable for its connectivity in the network. It uses electromagnetic waves. Some of the wireless technologies are :
(i) Bluetooth
(ii) Radiowave
(iii) Infrared
(iv) Microwave
(v) Satellite communication
(i) Bluetooth It is used for exchanging data over a short distance from fixed and mobile devices. This type of media comes under PAN (Personal Area Network).
(ii) Radiowave When two terminals are connected by using radio frequencies, then such type of communication is known as radiowave transmission.
Radiowave transmission set-up has two parts.
• Transmitter Devices, which transmit signals are termed as transmitter.
• Receiver Devices, which receive signals are known as receiver.
Question. What is the difference between star topology and bus topology of network?
Ans. Differences between star topology and bus topology are as follows :
Question. What are the functions of the following devices?
(i) Repeater
(ii) Switch
Ans. (i) Repeater It is a network device, that amplifies and restores signals for long distance transmission.
It interconnects identical network. Useful for long distance transmission, as they assure that there is no loss of data packets on the way.
(ii) Switch It is a device used to segment networks into different subnetworks, called subnets or LAN segments. This prevents traffic overloading. Switches are responsible for filtering, i.e. transforming data in a specific way and forwarding packets.
Question. Write down any two points of differences between LAN, MAN and WAN.
Ans. Two major points of differences among LAN, MAN and WAN are as follows
Question. Define tree topology. Also, write down its two limitations.
Ans. A tree topology is an extension and variation of bus topology. Its basic structure is like an inverted tree, where the root acts as a server.
Limitations
• Long cables are required for this kind of topologies.
• There is the dependence on the root node.
Question. Define repeaters with its two types.
Ans. Repeaters are used to amplify the signals, when they are transported over a long distance.
Repeaters are of two types
(i) Amplifier It amplifies or boosts the incoming signals. So, it amplifies both the signal and any concurrent noise.
(ii) Signal repeater It only amplifies the signal and filters out the noise signals. So, we get only the clear signal at the receiver end.
Question. Write the difference between LAN and MAN.
Ans. Differences between LAN and MAN are as follows
Question. A company wants to form a network on their five computers to a server within the company premises. Represent star and ring topologies diagrammatically for this network.
Ans.
Question. Distinguish between website and web browser.
Ans. Website is a place on the net servers to keep web pages. Web browser is a software application for retrieving, presenting and traversing information on the world wide web.
Question. Write a short note on LAN and PAN.
Ans. LAN A Local Area Network is a computer network covering a small geographical area like a home, office or small group of building such as building in a school. Computer connected to a LAN can share information and peripheral equipments.
PAN It stands for Personal Area Network. It is a computer network used for communication among computer and different technological devices close to it. Technologies such as bluetooth and infrared communication form a wireless PAN around the device.
Question. When the computer network uses telephone lines as communication channel then MODEM is used as a data communication device. Now, explain the working of MODEM.
Ans. MODEM performs the task of modulation at sender’s site and DEModulation at the receiver’s site. Basically, our computer generates data in the form of digital signals, which need to be forwarded to the receiver through telephone lines. Since, telephone lines can carry only analog signals. So, digital signals need to be converted to analog signals at sender’s site, this is called modulation. At receiver’s site, again analog signals should be converted back to the original digital signals, then this is called demodulation.
Question. What is the significance of HTTP?
Ans. HTTP is a protocol used on Internet. It works in combination with WWW. It allows us to access hypertext documents on WWW. Since, WWW allow us to access or use multimedia files on the Internet and the hypertext files supports multimedia.
Question. Differentiate between the terms Internet and Intranet.
Ans. Differences between Internet and Intranet are as follows
Question. Explain the term
(i) Bandwidth
(ii) Broadband
Ans. (i) Bandwidth It is the communication capacity of a network. It refers to the data carrying capacity of a channel or medium.
(ii) Broadband It is a wide bandwidth data transmission with an ability to simultaneously transport multiple signals and traffic types.
Question. What is protocol? Which protocol is used to copy a file from/to a remote server?
Ans. Protocol is a set of rules that two or more computers must follow to communication on network. FTP (File Transfer Protocol) is used to copy a file from/to a remotely located server.
Question. Identify the following devices
(i) A device that is used to connect different types of networks. It performs the necessary translation so that the connected networks can communicate properly.
(ii) A device that converts data from digital bit stream into an analog signal and vice-versa.
Ans. (i) Router
(ii) Modem
Question. In networking, what is WAN? How is it different from LAN?
Ans. The network which connects the different countries is known as WAN.
Differences between LAN and WAN are as follows
Question. Write any two uses of Internet.
Ans. Two uses of Internet are as follows:
(i) Internet is used for communication and information sharing.
(ii) Business use the Internet to provide access to complex databases.
Question. In twisted pair cable, two insulated wires are twisted around each other which provides protection against noise. Explain.
Ans. Twisting the cables keep them close together so that, any external magnetic fields must cross both cable at the same time, so the interference created in one cable is cancelled by the almost exact opposite amount of interference in the other.
Question. Write one advantage of star topology over bus topology and one advantage of bus topology over star topology.
Ans. Advantage of star topology over bus topology The star topology is the most reliable as there is a direct connection of every nodes in the network with the central node, so any problem in any node will affect the particular node only. While in bus topology, if problem exists in common medium, it will affect the entire node.
Advantage of bus topology over star topology Extension of network is very easy in bus topology. We can connect new node along its length. While in star topology, it is difficult to expand, as the new node has to connect all the way to central node and there is not available port in central node.
Question. Differentiate between XML and HTML.
Ans. XML was designed to describe data and to focus on what data is. HTML was designed to display data and to focus on how data looks.
HTML is about displaying information while XML is about describing information.
Question. Explain two problems that can occur during transmission of data.
Ans. Two problems that can occur during transmission of data are as follows
(i) Crosstalk Disturbance caused by the electric or magnetic fields of one signal in an adjacent signal.
(ii) Attenuation During transmission, the signal strength is reduced, this phenomenon is called attenuation.
Question. Explain the three main parts of an optical fibre cable.
Ans. The three main parts of an optical fibre cable are as follows
(i) Core It is the section through which the data travel in the form of light.
(ii) Cladding It is the covering part of core. Its function is to reflect back the light into the core, as it is a denser medium.
(iii) Protective Coating It is the outer cover of cladding for the protection of optical fibre from damage and moisture.
Question. What is the difference between domain name and IP address?
Ans. IP address is an identifier for a computer or device on a TCP/IP network.
e.g. 1.160.10.240 could be an IP address.
A domain name is a name that identifies one or more IP addresses.
e.g. The domain name microsoft.com represents about a dozen IP addresses.
Question. Identify the following devices
(i) An intelligent device that connects several nodes to form a network and redirects the received information only to intended node(s).
(ii) A device that regenerates (amplifies) the received signal and re-transmits it to its destinations.
Ans. (i) Switch
(ii) Repeater
Question. Write one advantage and one disadvantage of using optical fibre cable.
Ans. Advantage of using optical fibre cable It is immune to electrical and magnetic interference, i.e. the data does not get disturbed and pure data is retrieved on the other end.
Disadvantage of using optical fibre cable Connecting either two fibres together or a light source to a fibre is a difficult process.
Question. Discuss the functioning of a web browser and web server.
Ans. Web browsers became such a pervasive way to access information that users and organisations desired to access. So, web servers had to be extended to allow software application development and access to database.A web server provides four major functions
(i) Surfing web pages.
(ii) Running gateway programs and returning output.
(iii) Controlling access to the server.
(iv) Monitoring and logging server access statistics.
Question. What is the use of baud rate?
Ans. Baud rate is a measure of the number of symbols (signals) transferred or line changes every second. It may represent more than one binary bit.
Every symbol can represent or convey one or several bits of data. For a binary signal of 20 Hz, this is equivalent to 20 baud.
Question. Write two advantages of using an optical fibre cable over an ethernet cable to connect two service stations, which are 190 m away from each other.
Ans. Low power Because signals in optical fibres degrade less, lower power transmitters can be used.
Higher data rate Due to higher bandwidth, data rate of optical fibre is more than the data rate of ethernet cable (upto 1 Gbps).
Question. What is the difference between message switching and packet switching?
Ans. In message switching, data packets are stored on the disk while in packet switching, all the packets of fixed size are stored in main memory making it more efficient as compared to other switching techniques.
Question. Write a short note on IP address and give its characteristics.
Ans. Internet internally follows number based addressing system. Numeric address of a computer is called IP address by a scheme called Domain Name System (DNS).
The IP address consists of four numbers from 0 to 255 separated by dots.
The characteristics of an IP address are as follows
(i) IP addresses are unique.
(ii) IP addresses are global and standardised.
Question. Compare and contrast the two wireless transmission media : bluetooth and infrared.
Ans. Bluetooth and infrared both are short range wireless transmission media. This is the only point at which both these data transmission technologies look similar but there is a lot of differences between the two. Infrared is mostly used in TV remotes and there must be a direct line-of-sight between the transmitter and the receiver while on the other hand bluetooth uses a radio frequency which allows transmission through walls and other objects.
Question. In which communication, the computers in a network are connected through wire or cable?
Explain its types, if any.
Ans. Wired communication is the communication in which the wires or cables are used for connecting different devices in a network.
There are three types of wired communication.
(i) Twisted pair cable Two identical wires are wrapped together and twisted around each other.
(ii) Co-axial cable It consists of a core wire surrounded by foil shields or conducting braid or wire mesh.
(iii) Optical fibre cable It consists of thin threads made up of glass like substance, which are capable of carrying light signal from one end to another.
Optical fibre consists of the following parts
• Core
• Cladding
• Protective coating
Question. Write one advantage of bus topology of network. Also, illustrate how four computers can be connected with each other using star topology of network?
Ans. Advantage of bus topology In bus topology, computers can be connected with each other using server (host) along a single length of cable.
Four computers can be connected with each other using star topology in the following way:
Question. Write the name of benefits of networking.
Ans. Some of the benefits of networking are
(i) File sharing
(ii) Hardware sharing
(iii) Application sharing
(iv) User communication
(v) Access to remote database
Question. How is co-axial cable different from optical fibre?
Ans. Differences between co-axial cable and optical fibre.
Long Answer Type Questions :
Question. G.R.K International Inc. is planning to connect its Bengaluru Office Setup with its Head Office in Delhi. The Bengaluru Office G.R.K. International Inc. is spread across an area of approx. 1 square kilometres consisting of 3 blocks. Human Resources, Academics and Administration. You as a network expert have to suggest answers to the four queries (i) to (v) raised by them.
Note – Keep the distances between blocks and number of computers in each block in mind, while providing them the solutions.
(i) Suggest the most suitable block in the Bengaluru Office Setup to host the server. Give a suitable reason with your suggestion.
(ii) Suggest the cable layout among the various blocks within the Bengaluru Office Setup for connectiing the blocks.
(iii) Suggest a suitable networking device to be installed in each of the blocks essentially required for connecting computers inside the blocks with fast and efficient connectivity.
(iv) Suggest the most suitable media to provide secure, fast and reliable data connectivity between Delhi Head Office and the Bengaluru Office Setup.
(v) Expand the following
• WAN
• LAN
Ans. (i) Human Resources, because it has maximum number of computers.
(ii)
(iii) Hub/Switch.
(iv) Satellite.
(v) • Wide Area Network
• Local Area Network
Question. Eduminds University of India is starting its campus in a small town Parampur of Central India with its centre admission office in Delhi. The university has three major buildings comprising of Admin building, Academic building and Research building in 5 km area campus.
As a network expert, you need to suggest the network plan as per (i) to (v) to the authorities keeping in mind the distances and other given parameters.
(i) Suggest the authorities, the cable layout amongst various buildings inside the university campus for connecting the buildings.
(ii) Suggest the most suitable place (i.e. building) to house the server of this organisations with a suitable reason.
(iii) Suggest an efficient device for the following to be installed in each of the building to connect all the computers
(a) Gateway
(b) Modem
(c) Switch
(iv) Suggest the most suitable (very high speed) service to provide data connectivity between admission building located in Delhi and the campus located in Parampur form the following options:
• Telephone line
• Fixedline dial-up connection
• Co-axial cable network
• GSM
• Leased line
• Satellite connection.
(v) University is planning to connect its campus in Delhi which is less than 100 km. Which type of network will be formed?
Ans. (i)
(ii) The most suitable place to house the server is Academic Building as it has maximum number of computers. Thus, it decreases the cabling cost and increase efficiency of network.
(iii) (c) Switch is to be installed in each of building to connect all the computers.
(iv) Satellite connection.
(v) MAN
Question. 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 (v) below.
Physical locations of the blocks of TTC
(i) Which will be the most appropriate block, where TTC should plan to install their server?
(ii) Draw a block to block cable layout to connect all the buildings in the most appropriate manner for efficient communication.
(iii) What will be the best possible connectivity out of the following, you will suggest to connect the new set up of offices in Bengalore with its London based office.
• Satellite Link
• Infrared
• Ethernet
(iv) Which of the following device will be suggested by you to connect each computer in each of the buildings?
• Switch
• Modem
• Gateway
(v) Company is planning to connect its offices in Hyderabad which is less than 1 km. Which type of network will be formed?
Ans. (i) TTC should install its server in finance block as it is having maximum number of computers.
(ii)
The layout is based on minimum cable length required, which is 120 metres in the above case.
(iii) Satellite Link.
(iv) Switch.
(v) LAN
Question. Expertia Professional Global (EPG) in an online corporate training provider company for IT related courses. The company is setting up their new campus in Mumbai. You as a network expert have to study the physical locations of various buildings and the number of computers to be installed. In the planning phase, provide the best possible answers for the queries (i) to (v) raised by them.
(i) Suggest the most appropriate building, where EPG should plan to install the server.
(ii) Suggest the most appropriate building to building cable layout to connect all three buildings for efficient communication.
(iii) Which type of network out of the following is formed by connection the computers of these three buildings?
(a) LAN
(b) MAN
(c) WAN
(iv) Which wireless channel out of the following should be opted by EPG to connect to students of all over the world?
(a) Infrared
(b) Microwave
(c) Satellite
(v) Expand the following
• WAN
• MAN
Ans. (i) EPG should install the server in the Faculty Studio Building as it has maximum number of computers.
(ii)
(iii) (a) LAN (Local Area Network).
(iv) (c) Satellite.
(v) • Wide Area Network
• Metropolitan Area Network
Question. Freshminds University of India is starting its first campus in Ana Nagar of South India with its centre admission office in Kolkata. The university has three major blocks comprising of Office block, Science block and Commerce block is in 5 km area campus.
As a network expert, you need to suggest the network plan as per (i) to (v) to the authorities keeping in mind the distance and other given parameters.
(i) Suggest the authorities, the cable layout amongst various blocks inside university campus for connecting the blocks.
(ii) Suggest the most suitable place (i.e. block) to house the server for this university with a suitable reason.
(iii) Suggest an efficient device form the following to be installed in each of the block to connect all the computers.
(a) Modem
(b) Switch
(c) Gateway
(iv) Suggest the most suitable (very high speed) service to provide data connectivity between admission office located in Kolkata and the campus located in Ana Nagar form the following options:
• Telephone line
• Fixedline dial-up connection
• Co-axial cable network
• GSM
• Leased line
• Satellite connection.
(v) University is planning to connect its campus in Kolkata which is more than 100 km. Which type of network will be formed?
Ans. (i)
(ii) The most suitable place to house the server is Science Block as it has maximum number of computers. Thus, reducing the cabling cost and increases efficiency of network.
(iii) (b) Switch is the device to be installed in each of the blocks to connect all the computers.
(iv) Satellite connection.
(v) MAN
Question. China Middleton Fashion is planning to expand their network in India, starting with two cities in India of provide infrastructure for distribution of their product. The company has planned to set up their main office units in Chennai at the different locations and have named their offices as Production Unit, Finance Unit and Media Unit. The company has its Corporate Unit in Delhi. A rough layout of the same is as follows:
(i) Suggest the kind of network required (out of LAN, MAN, WAN) for connecting each of the following office units:
• Production Unit and Media Unit
• Production Unit and Finance Unit.
(ii) Which one of the following device will you suggest for connecting all the computers with in each of their office units?
• Switch/Hub
• Modem
• Telephone.
(iii) Which of the following communication media, will you suggest to be procured by the company for connecting their local office units in Chennai for very effective (high speed) communication?
• Telephone cable l Optical fibre
• Ethernet cable.
(iv) Suggest a cable/wiring layout for connecting the company’s local office units located in Chennai. Also, suggest an effective method/technology for connecting the company’s office unit located in Delhi.
(v) Suggest the most suitable place to install the server with reason.
Ans. (i) MAN and LAN.
(ii) Switch/Hub.
(iii) Optical fibre.
(iv)
An effective method/technology for connecting the company’s office in Delhi and Chennai is broadband connection.
(v) Production unit is suitable to install the server because it has maximumk number of computers.
Question. Vidya for All is an educational NGO. It is setting up its new campus at Jaipur for its web-based activities. The campus has four buildings as shown in the diagram below:
(i) Suggest a cable layout of connection between the buildings.
(ii) Suggest the most suitable place (i.e. building) to house the server for this NGO. Also, provide a suitable reason for your suggestion.
(iii) Suggest the placement of the following devices with justification:
(a) Repeater
(b) Hub/Switch.
(iv) The NGO is planning to connect its international office situated in Delhi. Which out of the following wired communication links, will you suggest for a very high speed connectivity?
(a) Telephone analog line
(b) Optical fibre
(c) Ethernet cable.
(v) Expand the MODEM.
Ans. (i)
(ii) The most suitable place to house the server for this NGO is Training Building because it has the maximum number of computers.
(iii) (a) Repeater As per one layout (shown in (i)), the repeater can be avoided as all distances between the compounds are < = 100m.
(b) Hub/Switch Training building as it is hosting the server.
(iv) (b) Optical fibre.
(v) Modulator Demodulator
Question. Granuda consultants are setting up a secured network for their office campus at Faridabad for their day-to-day office and web based activities. They are planning to have connectivity between 3 buildings and the head office situated in Kolkata. Answer the questions (i) to (v) after going through the building positions in the campus and other details, which are given below.
(i) Suggest the most suitable place (i.e. block) to house the server of this organisation. Also, give a reason to justify your suggested location.
(ii) Suggest a cable layout of connections between the building inside the campus.
(iii) Suggest the placement of the following devices with justification:
(a) Switch
(b) Repeater
(iv) The organisation is planning to provide a high speed link with its head office situated in the Kolkata using a wired connection. Which of the following cable will be most suitable for this job?
(a) Optical fibre
(b) Co-axial cable
(c) Ethernet cable
(v) Consultancy is planning to connect its office in Faridabad which is more than 10 km from Head office. Which type of network will be formed?
Ans. (i) The most suitable place to house the server is JAMUNA because it has maximum number of computers.
(ii)
(iii) (a) Switches are needed in every building to share bandwidth in every building.
(b) Repeaters may be skipped as per above layout, (because distance is less than 100 m) however, if building RAVI and building JAMUNA are directly connected, we can place a repeater there as the distance between these two buildings is more than 100 m.
(iv) (b) Co-axial cable.
(v) MAN
Question. 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) to (v) below.
(i) What will the most appropriate block, where TUC should plan to install their server?
(ii) Draw a block to block cable layout to connect all the buildings in the most appropriate manner for efficient communication.
(iii) What will be the best possible connectivity out of the following, you will suggest to connect the new setup of offices in Bengalore with its London based office?
• Infrared
• Satellite Link
• Ethernet Cable
(iv) Which of the following devices will be suggested by you to connect each computer in each of the buildings?
• Gateway
• Switch
• Modem
(v) Company is planning to connect its Block in Hyderabad which is more than 20 km. Which type of network will be formed?
Ans. (i) TUC should install its server in Human Resource Block as it has maximum number of computers.
(ii)
The above layout is based on the minimum length of cable required, i.e. 140 m.
(iii) Satellite Link.
(iv) Switch.
(v) MAN
Question. Institute of Distance Learning is located in Pune and is planning to go in for networking of four wings for better interaction. The details are shown below:
(i) Suggest the type of networking (LAN, MAN, WAN) for connecting Lib Wing to Admin Wing. Justify your answer.
(ii) Suggest the most suitable place (i.e. wing) to house the server, with a suitable reason.
(iii) Suggest and placement of the following devices with reasons.
(a) Repeater
(b) Switch
(iv) The Institute is planning to link its study centre situated in Delhi. Suggest an economic way to connect it with reasonably high speed. Justify your answer.
(v) Expand the following
• PAN
• WAN
Ans. (i) Since, the distance between LibWing and Admin Wing is small. So type of networking is small, i.e. LAN.
(ii) Since, maximum number of computers are in Student Wing, so suitable place to house the server is Student Wing.
(iii) (a) Repeater should be installed between Student Wing and Admin Wing as distance is more than 60 m.
(b) Switch should be installed in each wing to connect several computers.
(iv) Broadband connection as it is between economical and speedy.
(v) • Personal Area Network
• Wide Area Network
Question. Gargi Education Service Ltd. is an educational organisation. It is planning to set up its India campus at Nepal with its head office at Mumbai. The Nepal campus has 4 main buildings – ADMIN, ENGINEERING, BUSINEES and MEDIA.
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 distance between the buildings and other given parameters.
(i) Suggest the most appropriate location of the server inside the Nepal Campus (out of 4 buildings), to get the best connectivity for maximum number of computers. Justify your answer.
(ii) Suggest and draw the cable layout to efficiently connect various buildings within the Nepal Campus for connecting the computers.
(iii) 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.
(iv) Which of the following will you suggest to establish the online face-to-face communication between the people in the ADMIN office of Nepal Campus and Mumbai Head Office?
(a) Cable TV
(b) E-mail
(c) Video Conferencing
(d) Text Chat
(v) Expand the following
• MAN
• PAN
Ans. (i) ADMIN is the most appropriate location of the Nepal Campus because it has maximum number of computers.
(ii)
(iii) Firewall.
(iv) (c) Video Conferencing.
(v) • Metropolitan Area Network
• Personal Area Network
Question. Workalot consultants are setting up a secured network for their office campus of Gurgaon for their day-to-day office and web based activities. They are planning to have connectivity between 3 buildings and the head office situated in Mumbai. Answer the questions (i) to (v) after going through the building positions in the campus and other details, which are given below:
(i) Suggest the most suitable place (i.e. building) to house the server of this organisation. Also, give a reason to justify your suggested location.
(ii) Suggest a cable layout of connections between the buildings inside the campus.
(iii) Suggest the placement of the following devices with justification :
(a) Switch (b) Repeater
(iv) The organisation is planning to provide a high speed link with its head office situated in the Mumbai using a wired connection. Which of the following cables will be most suitable for this job?
(a) Optical fibre
(b) Co-axial cable
(c) Ethernet cable
(v) What is the use of firewall in network?
Ans. (i) Building RED is the suitable place to house the server because it has maximum number of computers.
(ii)
(iii) (a) Switches are needed in every building as they help share bandwidth in every building.
(b) Repeaters may be skipped as per above layout (because distance is less than 100 m), however if building GREEN and building RED are directly connected, we can place a repeater there as the distance between these two buildings is more than 100 m.
(iv) (b) Co-axial cable.
(v) Firewall prevents the unauthorised access in the network.
Question. Quick Learn University is setting up its academic blocks at Prayag Nagar and planning to set up a network. The university has three academic blocks and one human resource centre as shown in the diagram below:
(i) Suggest the most suitable place (i.e. block/centre) to install the server of this university with a suitable reason.
(ii) Suggest an ideal layout for connecting these block/centre for a wired connectivity.
(iii)Which device you will suggest to be placed/installed in each of these blocks/centre to efficiently connect all the computers with in these blocks/centre ?
(iv) The university is planning to connect its admission office in the closest big city, which is more than 250 km from university, which type of network out of LAN, MAN or WAN will be formed? Justify your answer.
(v) Expand the following
• LAN
• WAN
Ans. (i) HR centre as it has maximum number of computers.
(ii)
(iii) Switch.
(iv) WAN as it is another city.
(v) • Local Area Network
• Wide Area Network
Question. BiasMethodologies is planning to expand their network in India, starting with three cities in India to build infrastructure for research and development of their chemical products. The company has planned to set up their main office in Pondicherry at three different locations and have named their offices as Back Office, Research Lab and Development Unit. The company has one more research office namely Corporate Unit inMumbai. A rough layout of the same is as follows:
In continuation of the above, the company experts have planned to install the following number of computers in each of their offices
(i) Suggest the type of network required (out of LAN, MAN, WAN) for connecting each of the following office units.
•Research Lab and Back Office
• Research Lab and Development Unit.
(ii) Which one of the following device, will you suggest for connecting all the computers with in each of their office units?
• Switch/Hub l Modem
• Telephone.
(iii) Which of the following communication medium, will you suggest to be procured by the company for connecting their local office units in Pondicherry for very effective (high speed) communication?
• Telephone cable l Optical fibre
• Ethernet cable.
(iv) Suggest a cable/wiring layout for connecting the company’s local office units located in Pondich-erry. Also, suggest an effective method/technology for connecting the company’s office unit located in Mumbai.
(v)Which building is suitable to install the server with suitable reason?
Ans. (i) LAN and MAN.
(ii) Switch/Hub.
(iii) Optical fibre.
(iv)
An effective method/technology for connecting the company’s offices–unit located in Mumbai is dial-up or broadband.
(v) Research lab is suitable to install the server because it has maximum number of computers.
Question. Learn Together is an educational NGO. It is setting up its new campus at Jabalpur for its web-based activities. The campus has four compounds as shown in the diagram below:
(i) Suggest a cable layout of connections between the compounds.
(ii) Suggest the most suitable place (i.e. compound) to house the server for this NGO. Also, provide a suitable reason for your suggestion.
(iii) Suggest the placement of the following devices with justification:
(a) Repeater
(b) Hub/Switch
(iv) The NGO is planning to connect its international office situated in Mumbai, which out of the following wired communication link, will you suggest for a very high speed connectivity?
(a) Telephone analog line
(b) Optical fibre
(c) Ethernet cable.
(v) Expand the following
• LAN
• PAN
Ans. (i)
(ii) The most suitable place to house the server is Training Compound as it has maximum number of computers.
(iii) (a) Repeater As per one layout (shown in (i )), the repeater can be avoided as all distances between the compounds are <=100 m.
(b) Hub/Switch Training compound as it is hosting the server.
(iv) (b) Optical fibre.
(v) • Local Area Network
• Personal Area Network
