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Wi-Fi & NFC in Mobile Computing

Wifi & NFC in Mobile Computing in Hindi  


  • While Wi-Fi is suitable for long-distance and high-speed internet connections,
  • Bluetooth is great for connecting short-distance devices and audio transfer,
  • NFC is the quickest and easiest technology that is excellent for payments and adding devices.
  • All three technologies—Wi-Fi, Bluetooth, and NFC—are important in improving the modern multimedia experience.
  • These three technologies are complementary to each other and together make our lives easier and more connected.
  • Wi-Fi, Bluetooth, and NFC (Near Field Communication) are three important wireless technologies that facilitate connectivity and data transfer in today's modern world. 
  • All these technologies play an important role in multimedia use. There is a difference in the working system, use, and features among these three. 
Let's understand these technologies in detail.

Wi-Fi:

Wi-Fi (Wireless Fidelity) is a wireless network technology that connects devices to the internet and other networks. It uses radio waves and works over a wide area.

Features:

  • Speed and Range: Wi-Fi provides high speed (from 10 Mbps to 1 Gbps) and long range (from 50-300 meters).
  • Internet Connection: This is helpful in transferring multimedia files like video streaming, online gaming, and high-quality audio.
  • Multi-device Support: Wi-Fi can connect multiple devices at the same time.
  • Use: Wi-Fi is used in homes, offices, and public places like airports, railway stations, etc.
  • Bluetooth: Bluetooth is a short-range wireless technology that is used for device-to-device connection. It is ideal for data and audio transfer over short distances (10-100 meters).
Features:

  • Low Power Consumption: It uses less energy, which makes it suitable for battery-operated devices like headphones and smartwatches.
  • Audio and Data Transfer: Bluetooth is used for wireless audio devices, such as speakers and earphones.
  • Portable Connection: It provides a simple and fast way to connect two devices.
  • Security: It has data encryption, which makes it secure.
NFC (Near Field Communication):

NFC is a short-range wireless technology that is used to establish contact between two devices. It is mainly used for mobile payments, ticketing, and other quick data transfer tasks.

Features:

  • Very short range: The range of NFC is limited to 4 to 10 centimeters.
  • Quick Payment and Transfer: It is used in contactless payments, such as Google Pay and Apple Pay.
  • Security: It is considered more secure due to its short range.
  • Use: NFC is also used for e-ticketing, access cards, and document sharing.
Use in Multimedia:

1. Wi-Fi:

  • Online video and music streaming (like Netflix, Spotify).
  • Downloading and uploading large files like HD videos.
  • Multiplayer gaming.
2. Bluetooth:

  • Audio transfer for wireless speakers and earphones.
  • Photo and video transfer, but for small files.
  • Connecting mobile and laptop.
3. NFC:

  • Instantly connecting mobile to speaker or headphone.
  • Transferring photos from digital cameras.
  • NFC-supported video sharing.

In this Chapter

Wi-Fi & NFC in Mobile Computing
What is a Wireless Network?
Mobile Network Architecture
Signal Transmission & Handoff
GSM
Frequency Spectrum Management
Android & IOS
Mobile Networking
Mobile Application Development
Location-Based Services
Application of Mobile Computing