In this article we providing information regarding latest Navodaya Class 7 Computer Subject April June Month Notes 2026.
Navodaya Class 7 Computer Subject April June Month Notes 2026
April – June-2026 : NVS Class 7 Computer Science Syllabus
- Introduction to Computer Networks(Part 1):
- a) What is a network?
- b) Types of Network
- c) What is Network Cabling?
- d) Types of cables used in networks
- e) Computer network components
- Introduction to internet:
- a) What is the internet?
- b) Applications of the Internet.
Introduction to Computer Networks (Part 1)
1. What is a Network?
A computer network is a group of two or more computers and devices connected together to share information and resources.
Examples:
- Computers connected in a school computer lab.
- Mobile phones connected through the Internet.
- Computers connected in an office.
Advantages of a Network:
- Sharing files and data.
- Sharing printers and other devices.
- Easy communication between users.
- Fast exchange of information.
2. Types of Network
a) LAN (Local Area Network)
A network that covers a small area such as a room, school, office, or building.
Examples:
- School computer lab
- Office network
Features:
- Fast speed
- Low cost
- Covers a small area
b) MAN (Metropolitan Area Network)
A network that covers a city or large town.
Examples:
- Network connecting different schools in a city
Features:
- Covers a larger area than LAN
- Connects multiple LANs
c) WAN (Wide Area Network)
A network that covers a very large area such as a country or the whole world.
Examples:
- The Internet
Features:
- Covers long distances
- Connects computers worldwide
3. What is Network Cabling?
Network cabling is the system of cables used to connect computers and other devices in a network.
These cables carry data from one device to another.
Importance of Network Cabling:
- Provides communication between devices.
- Helps in fast data transfer.
- Creates a reliable network connection.
4. Types of Cables Used in Networks
a) Twisted Pair Cable
The most commonly used network cable.
Features:
- Made of twisted copper wires.
- Low cost.
- Easy to install.
Example: Ethernet cable used in homes and schools.
b) Coaxial Cable
A cable with a copper wire surrounded by insulation.
Features:
- Strong and durable.
- Used for cable television and internet connections.
c) Optical Fiber Cable
A cable made of thin glass or plastic fibers.
Features:
- Very high speed.
- Can transmit data over long distances.
- More expensive than other cables.
5. Computer Network Components
The main components required to create a computer network are:
a) Computer
The main device used to send and receive data.
b) Network Interface Card (NIC)
A hardware device that allows a computer to connect to a network.
c) Switch
Connects multiple computers within a network.
d) Router
Connects different networks and provides Internet access.
e) Modem
Connects a computer network to the Internet service provider (ISP).
f) Network Cables
Used to physically connect devices in a network.
Introduction to Internet
1. What is the Internet?
The Internet is a worldwide network of millions of computers connected together.
It allows people to share information and communicate from anywhere in the world.
Features of the Internet:
- Global connectivity
- Fast communication
- Access to information
- Online services and learning
2. Applications of the Internet
a) Communication
- Video calls
- Instant messaging
b) Education
- Online classes
- Digital learning materials
- Educational websites
c) Entertainment
- Watching videos
- Playing online games
- Listening to music
d) Information Search
- Finding facts and news
- Research work
- Reading articles
e) Online Shopping
- Buying products online
- Comparing prices
f) Banking Services
- Money transfer
- Checking account balance
- Online payments
g) Social Networking
- Connecting with friends and family
- Sharing photos and messages
Quick Revision
✔ A network is a group of connected computers and devices.
✔ LAN, MAN, and WAN are the main types of networks.
✔ Network cabling connects devices and transfers data.
✔ Twisted Pair, Coaxial, and Optical Fiber are common network cables.
✔ Network components include NIC, Switch, Router, Modem, and Cables.
✔ The Internet is a worldwide network of computers.
✔ The Internet is used for communication, education, entertainment, banking, shopping, and information sharing.
Important Terms
- Network – Connected computers and devices.
- LAN – Local Area Network.
- MAN – Metropolitan Area Network.
- WAN – Wide Area Network.
- NIC – Network Interface Card.
- Router – Connects networks and provides Internet access.
- Internet – Worldwide network of computers.
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