Today almost every household,office and even educational institutes have Wi-Fi. It’s the most popular mode of accessing internet. Your smartphone,laptop,tablets, AC and even IoT devices use Wi-Fi. It has made our life simpler and smarter. With the evolution of Wi-Fi it has solved the hassle of connecting LAN cable to access internet, especially in Laptops. The advantage of Wi-Fi is unimaginable.

Do you know what Wi-Fi stands for? Have you come across terms like 802.11 b/g/n/ or a/b/g/n/ ? Savvydroid is here to explain you everything about Wi-Fi.

 

What’s Wi-Fi?

Wi-Fi stands for Wireless fidelity. Wi-Fi signals are generated by a Wi-Fi router. The signal acts as a medium for transfer of data between two devices. Routers come in different signal ranges. A standard Wi-Fi router has a range of 20-25 Ft. In-case obstacles like walls are in the vicinity of the signal, then the range may get affected by few percent.

 

What does a/b/g/n stand for?

They are certain standards used in Wi-Fi based devices. Each standard has certain frequency and transfer speed

  • a/b: They are not in existence now as its pretty old. Both of these Wi-Fi standards were able to provide very small bandwidth to transmit information.
  • g: It is the most used standard these days and uses 2.4Ghz  frequency to communicate and transfer data. It has transfer rate of upto 54Mbps
  • n: This is the latest Wi-Fi standard and uses 2.4Ghz or 5Ghz frequency for communication. With option of two bands ‘n’ provides good signal strength compared to other standards.

 

Dual band/Single band?

  • Single band : These router does not support 5GHz frequency and operates only at 2.4GHz frequency.
  • Dual band : As the name suggests the router supports both 2.4GHz as well as 5GHz frequency but it uses only one band of them at a time.
  • Simultaneous Dual band router : It supports multiple bands as a result we get better speed.

 

Security

Its always a good practice to protect your Wi-Fi from unauthorised access. If your Wi-Fi is not protected then hackers can access personal data on the network. Here are some things that you need to keep in mind.

  • Hide your Wi-Fi name(SSID): If no one sees it then no one can access it. But if you want known people to connect then you can still do it by entering the Wi-Fi name.
  • WEP/WPA2/WPA: Every Wi-Fi router has this feature. WEP is the weakest and it can be easily hacked with third party softwares. Whereas WPA-2 is considered the best. It stands for Wi-Fi Protected Access 2 . It is secure, progressive and most ordinary protocol out there and it is mandatory. Again there are two modes under WPA-2, i.e Personal and Enterprise. Personal mode allows it’s users to set a password within the 8-63 characters. Business and small offices use Enterprise mode that uses 256 bit key.

Wi-Fi is evolutioning every single day. There are so many variants out, The following IEEE 802.11 standards exist or are in development to support the creation of technologies for wireless local area networking:

  • 802.11a – 54 Mbps standard, 5 GHz signaling (ratified 1999)
  • 802.11b – 11 Mbps standard, 2.4 GHz signaling (1999)
  • 802.11c – operation of bridge connections (moved to 802.1D)
  • 802.11d – worldwide compliance with regulations for use of wireless signal spectrum (2001)
  • 802.11e – Quality of Service (QoS) support (not yet ratified)
  • 802.11F – Inter-Access Point Protocol recommendation for communication between access points to support roaming clients (2003)
  • 802.11g – 54 Mbps standard, 2.4 GHz signaling (2003)
  • 802.11h – enhanced version of 802.11a to support European regulatory requirements (2003)
  • 802.11i – security improvements for the 802.11 family (2004)
  • 802.11j – enhancements to 5 GHz signaling to support Japan regulatory requirements (2004)
  • 802.11k – WLAN system management
  • 802.11l – skipped to avoid confusion with 802.11i
  • 802.11m – maintenance of 802.11 family documentation
  • 802.11n – 100+ Mbps standard improvements over 802.11g (2009)
  • 802.11o – skipped
  • 802.11p – Wireless Access for the Vehicular Environment
  • 802.11q – skipped
  • 802.11r – fast roaming support via Basic Service Set transitions
  • 802.11s – ESS mesh networking for access points
  • 802.11T – Wireless Performance Prediction – recommendation for testing standards and metrics
  • 802.11u – internetworking with 3G / cellular and other forms of external networks
  • 802.11v – wireless network management / device configuration
  • 802.11w – Protected Management Frames security enhancement
  • 802.11x – skipped (generic name for the 802.11 family)
  • 802.11y – Contention Based Protocol for interference avoidance

Hope you found this useful, now you know almost everything about Wi-FI. Go ahead, share this knowledge with your friends.

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