Monday, July 28, 2025

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.

Wednesday, July 23, 2025

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.

Friday, July 18, 2025

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.


General-Purpose Programming Languages

General-Purpose Programming Languages

1. Python – Easy syntax, data science, AI, web apps.
2. Java – Cross-platform apps, Android development.
3. C++ – High-performance apps, games, system software.
4. C – Operating systems, embedded systems.
5. C# – Windows apps, Unity game development.
6. Go (Golang) – Scalable servers and systems.
7. Rust – Safe and fast systems programming.

How to install an app

Open the Play Store (Android) or App Store (iPhone) on your smartphone.

Search for the app you want, then tap "Install" or "Get" to download it.

working of ISP


An ISP (Internet Service Provider) connects people to the internet using wires like cables or fiber, or through wireless signals.

The ISP sends and receives data between your device and the internet, allowing you to browse websites and use online services

Starlink Internet

Starlink gives internet using satellites in space that send signals to a special dish at your home.

The dish connects with the satellites, which send your messages to ground stations and bring back information from the internet quickly.

Thursday, July 17, 2025

class 3 Ch 3 Network of Networks



*FILL IN THE BLANKS:*
1. ISP stands for *Internet Service Provider*.
2. *Modem* brings the internet from ISPs to our homes.
3. The interconnected network of computers is also known as a *network/internet*.

*DESCRIPTIVE QUESTIONS:*
1. ISPs (Internet Service Providers) are companies that provide internet access to homes and businesses by connecting users to the internet using various technologies such as broadband, DSL, or fiber optics.
2. A modem connects your home to the internet, while a router distributes that connection to various devices within your home wirelessly or with wires.
3. Without internet, you won’t be able to stream videos, browse websites, access emails, use social media, play online games, or attend online classes.
4. Manoj could use his smartphone’s mobile data for internet access during his trip, as it allows him to stay connected even without traditional broadband.


Tuesday, July 15, 2025

class 4 Ch 3 Language of the internet


1. Explain webpage, website, and world wide web using an analogy.
Ans -A webpage is like one page in a book.
A website is like the whole book made of many pages.
The World Wide Web is like a big library that has all the books (websites) on the internet.

2. Explain how the worid wide web is different from the internet.
Ans- The Internet is the network of computers connected all over the world.
The World Wide Web is a part of the internet that has websites and webpages we can see using a browser.

3.Write down the keywords which should be used effectively search about the
foillowing information from a search engine:

A Finding out how the weather will be the next day
Ans- 1. Weather forecast
2. Temperature
3. Rainfall
4. Humidity
5. Wind speed
6. Cloudy
7. Sunny
8. Storm
9. Snowfall (for cold places)
10. Weather report


B. Result of football world cup final in 1986
Ans- 1986
2. Football World Cup
3. Final match
4. Argentina
5. West Germany
6. Winner
7. Score
8. 3–2
9. Mexico (host country)
10. Diego Maradona

C. Names of the various vacines developed to prevent CoVid-19
Ans- 1. COVID-19
2. Vaccine
3. Covaxin
4. Covishield
5. Sputnik V
6. Pfizer
7. Moderna
8. Johnson & Johnson
9. Prevention
10. Immunity

4. Write down the differences between browser and search engine.
Ans- Browser is a software application used to access and view websites (e.g., Chrome, Firefox).

Search Engine is a website that helps you find information on the internet (e.g., Google, Bing).

5.List the steps ivolved when we access a website.
Ans- 1. Type the website URL in the browser’s address bar.


2. Browser sends a request to the web server, and the server responds by sending the website data to the browser for display.






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 ...