Ch 9 | Grade 4| What does data do

Ch 9| Forecasting from Data |Grade 5th

How broadband work? How DSL works?

📶 DSL (Digital Subscriber Line)

1. DSL uses existing telephone lines to deliver internet.

2. It allows both internet and phone calls on the same line.

3. A splitter separates the voice and data signals.

4. Speed depends on the distance from the telephone exchange.

5. It's faster than dial-up but slower than fibre.

🌐 Broadband

1. Broadband is high-speed internet with a wide bandwidth.

2. It includes DSL, cable, fibre, and satellite connections.

3. It allows multiple devices to stay online at once.

4. Speeds are usually consistent and fast.

5. It’s always on—no need to dial in like older connections.

🔌 Fibre Optics

1. Fibre optic cables carry data as light signals.

2. They offer ultra-fast and reliable internet.

3. Made of thin glass or plastic strands.

4. Not affected by electrical interference.

5. Perfect for high-speed video, gaming, and downloads.

📡 Router

1. A router connects your home devices to the internet.

2. It sends data between your devices and the modem.

3. Wireless routers provide Wi-Fi access.

4. It can connect multiple devices at once.

5. Often includes security features like firewalls.

How Internet Works

HOW ROUTER WORKS

1. The router is connected to the internet through a modem.

2. It takes the internet signal and shares it with devices.

3. It decides which device gets which part of the data—like sorting snacks into lunchboxes.

4. It keeps data flowing smoothly so no one gets left behind.

Why computer only understand 0 and 1

Computers only understand 0 and 1 because their internal components, mainly transistors, can be in just two states: on (represented as 1) or off (represented as 0). This binary system makes it simple and highly reliable to represent, store, and process information electronically using distinct voltage levels

3rd Ch 4 Mother Tongue of Computer

FILL IN THE BLANKS" 

An algorithm is a set of stepwise instructions to finish a task.

A computer can understand machine language.

An algorithm written by humans for a computer is called program.

Programmers instruct computers in programming language.

Machine language is also known as binary language.