can anyone share with me their isc class 12 computer project
Answers
Explanation:
RADIANT INTERNATIONAL SCHOOL
CLASS – VII (LESSON - 1)
NETWORK COMMUNICATION AND MOBILE OS
NOTES AND EXERCISE
A. State true or false.
1. True
2. False
3. False
4. True
5. True
B. Fill in the blanks:
1. Wired and Wireless
2. File Server
3. Local Area Network (LAN)
4. Mobile Application Development
5. Android OS
C. Give differences between:
1. LAN AND MAN:
LAN – When the computers are interconnected within a limited geographical area it becomes a Local Area Network (LAN)
MAN - When the computers are interconnected within the same city, that is the branches located at different places in the same city, then it becomes a Metropolitan Area Network (MAN)
2. Star topology and Bus topology:
Star topology – Star topology is the most common topology used. Here all the workstation are connected to a central hub.
Bus topology – Bus topology is made up of a main single cable with the terminators at both ends. It is the shared communication medium that makes the backbone of the system.
3. Desktop and Mobile OS:
Desktop – Desktop operating systems are designed keeping computers in mind. They provide an environment that helps in better functioning of different application software having a wide range of connected hardware.
Mobile OS – It is a GUI developed for smartphones to run application and programs.
4. Android and iPhone OS:
Android – It is an open source and freely available Linux based mobile OS.
iPhone OS – This mobile OS has been designed by Apple Incorporation, mainly for iPhones, iPods and iPads.
5. Client/Server architecture and Peer-to-peer architecture:
Client/Server architecture – A specific type of a network consisting of a single powerful computer acting as a server usually connected to multiple computers called clients is known as Client/Server architecture.
Peer-to-peer architecture - Peer-to-peer architecture is a type of network in which each workstation has equivalent capabilities and responsibilities.
D. Match the following (Answers given in front of each question)
1. Android – Prone to malware threat
2. webOS – Linux based OS
3. Smartphones – Compact computers
4. iOS – Apple products
5. Mobile apps – Small software units with limited functions
E. Answer the following questions.
1. What is networking? State its advantages and disadvantages.
Ans – Networking is defined as a group of two or more computer system linked together for sharing resources such as printers, exchange files, or allow electronic communication.
Two advantages are as follows –
i. Centralised software management : Software can be loaded on the main computer, that is, the file server.
ii. Resource sharing: Resources such as printers, fax machines, Scanners and modems can be shared by connecting them in a network. Two disadvantages are as follows –
i. In case the server develops a fault, users may not be able to run the application programs and chances of data loss increase.
ii. As traffic increases on a network the performance degrades unless it is designed properly.
2. What are the different components of a computer network? Explain them briefly.
Ans - The different components of a network are as follows:-
i. Server – A server is a computer that manages the network resources, software and
files.
ii. Workstation – A workstation is a computer intended for individual use in a networking environment. iii. Network Interface Card – Network Interface card (NIC) is a piece of hardware placed inside the system unit. iv. Hub – A hub is a device that connects multiple devices and make them work as a single network segment.
v. Transmission channel – Each computer in a network is interconnected through transmission channels. These channels can be wired or wireless.
3. What is a topology? Explain the different types of topologies used in computer networks.
Ans – The physical arrangements of the cables, computers and other peripheral devices to form a network is known as topology. For example – Bus topology, Star topology, Ring topology.
The different types of topologies used in computer networks are as follows:-
i. Bus topology – Bus topology is made up of a main single cable with the terminators at both ends. It is the shared communication medium that makes the backbone of the system. Computers and the other devices including server are connected to this linear cable for communication.
ii. Star topology – Star topology is the most common topology used. Here all the workstation are connected to a central hub. Any data that is sent to the other computer, first goes to the central hub and from there it is redirected to the destination computer.