This practice paper contains various questions which are important for IP and CS students. It is an important topic for Class XII CBSE Boards Students and through this practice paper they will learn about the various concepts associated with Communication Channels and Network devices easily.
Question : What are the difference between LAN, MAN and WAN.
Property | LAN | MAN | WAN |
Range | 10m to 1 km | < 50kms | 100 kms -1000 kms |
Ownership | Owned by individuals or Organizations | Owned by service providers or government agencies. | Owned by service providers or government agencies |
Cost | Relatively inexpensive | More expensive than LANs | Most expensive of the three. |
Transmission Speed | Very high (up to 10 Gbps or more) | Moderate (up to 1 Gbps) | Slower (up to 45Mbps) |
Topology | Typically Star or Bus topology | can be any topology, but most commonly Ring or Mesh | can be any topology, but most commonly Mesh Topology |
Example | Home Networks, Small office, Schools | City wide networks, cable TV networks | Internet, international leased lines, satellite links. |
Question : What are the difference between Gateway and Bridge.
Bridge | Gateway | |
Function | Connects two or more LANs to form a single layer LAN. | Connects two networks that use different communication protocols. |
Addressing | Uses MAC addresses to forward traffic between networks. | Uses IP addresses to route traffic between networks |
Operating Layer | Operates at the Data Link Layer (Layer 2) | Operates at the Network Layer (Layer 3) |
Traffic Filtering | Doesn’t filter traffic between connected networks | can filter traffic based on predefined security policies. |
Network Connectivity | Connects similar networks using the same protocol. | Connects dissimilar networks using different protocols. |
Broadcasting | Passes broadcasts to all connected segments | Doesn’t pass broadcasts, and instead forwards unicast packets |
Latency | Low latency, because traffic is forwarded based on MAC address. | Higher latency, because traffic is forwarded based on IP address. |
Question : What are the difference between Hub and Switch.
Feature | Hub | Switch |
OSI Layer | Physical Layer | Data Link Layer |
Broadcasting | Broadcast data to all connected devices | Sends data to the intended device only |
Bandwidth | Shared Bandwidth | Dedicated bandwidth per port |
Collisions | High potential for collisions | No collisions between devices on separate ports |
Network Performance | Slower due to collisions and shared bandwidth | Faster and efficient with minimal collision |
Intelligence | No intelligence | Intelligent and can filter data. |
Cost | Inexpensive | More expensive than a hub |
Security | Less secure | More secure |
Question : Galaxy Provider Ltd. is planning to connect its office in Texas, USA with its branch at Mumbai. The Mumbai branch has 3 Offices in three blocks located at some distance from each other for different operations-ADMIN, SALES and ACCOUNTS. As a network consultant, you have to suggest the best network related solutions for the issues/problems raised in (a) to (d), keeping in mind the distances between various locations and other given parameters.
Layout of the Offices in the Mumbai branch:
Distance between various location | No of computers install at various location | ||||||||||||||||
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a) It is observed that there is a huge data loss during the process of data transfer from one block to another. Suggest the most appropriate networking device out of the following, which needs to be placed along the path of the wire connecting one block office with another to refresh the signal and forward it ahead. |
i) Modem |
ii) Ethernet Card |
iii) Repeater |
iv) Hub |
Answer : Option iii) Repeater |
b) Which hardware networking device out of the following, will you suggest to connect all the computers within each block? |
i) Switch |
ii) Modem |
iii) Repeater |
iv) Router |
Answer : Option i) Switch |
c) Which service/protocol out of the following will be most helpful to conduct live interactions of employees from Mumbai Branch and their counterparts in Texas? |
i) FTP |
ii) PPP |
iii) SMTP |
iv) VoIP |
Answer : Option iv) VoIP (Voice over Internet Protocol) |
d) Draw the cable layout (block to block) to efficiently connect the three offices of the Mumbai branch. |
Question : MyPlace University is setting up its academic blocks at Naya Raipur and is planning to set up a network. The institute has 3 academic blocks and one Human Resource Center as shown in the diagram
Center to Center distances between various blocks | No of computers install at various location | ||||||||||||||||||||
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a) Suggest the most suitable place (i.e., Block/Center) to install the server of this University with a suitable reason. |
Answer : Most suitable place to install the server is HR center, as this center has maximum number of computers, thus
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b) Suggest cable layout for the MyPlace University. |
c) Which device will you suggest to be placed/installed in each of these blocks/centers to efficiently connect all the computers within these blocks/centers. |
Answer : Switch |
d) Suggest the placement of a Repeater in the network with justification. |
Answer : Repeater is used when the distance between two blocks is more than 70m. But in our above layouts we don’t have distance more than 70m. |
e) The university is planning to connect its admission office in Delhi, which is more than 300 km from university. Which type of network out of LAN, MAN, or WAN will be formed? Justify your answer. |
Answer : WAN is preferred network. |
Question : Granuda Consultants are setting up a secured network for their office campus at Faridabad for their 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 (iv) after going through the building positions in the campus and other details, which are given below:
Distance between various buildings | Number of computers install at various location | ||||||||||||||||
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a) Suggest the cable layout of connections between the buildings. |
b) Suggest the most suitable place to house the server of this organization with a suitable reason. |
Answer: Most suitable place to install the server is Building Green, as this building has maximum no of computers, so
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c) Suggest the placement of the following devices with justification: i) Switch ii)Repeater |
Answer : Placement of Hub/Switch in the above layouts are : Placement of Repeater (use only if distance is more than 70m between 2 buildings) in the above layouts are: |
d) The organization is planning to provide a high speed link with its head office situated in the KOLKATA using a wired connection. Which of the following cables will be most suitable for this job? i) Optical Fiber ii) Co-axial Cable iii) Ethernet Cable |
Answer : option i) Optical Fiber |
e) Suggest the role of firewall in a network. |
Answer : A firewall is a network security device that monitors incoming and outgoing network traffic and decides whether to allow or block the specific traffic based on a defined set of security rules. A firewall can be hardware, software or both. |
f) Company is planning to get its website designed which will allow employees to see their all details after registering themselves on its server. Out of the static or dynamic, which type of website will you suggest. |
Answer : Dynamic Website |