Wi-fi 802.11 a/b/g/n dual-band la gi

By using some simple settings in the Wi-Fi router and wireless extenders, it is possible to make improvements to the Wi-Fi installation network speed. These bands have been internationally agreed and unlike most other bands, they can be used without the need for a transmitting licence.

This gives access to everyone to use them freely. The ISM bands are not only used by Wi-Fi, but everything from microwave ovens to many other forms of wireless connectivity and many industrial, scientific and medical uses.

Whilst the ISM bands are available globally, there are some differences and restrictions that can occur in some countries. It can be seen that the 2. Sometimes using other bands can improve the WLAN performance as a result of the lower interference levels. There are several different Different A summary of the bands used by the There is a total of fourteen channels defined for use by Wi-Fi installations and devices in the 2.

The Often nominal figures 0f 20 MHz are given for the Wi-Fi channels. The 22 MHz Wi-Fi channel bandwidth holds for all standards even though The differences occur in the RF modulation scheme used, but the WLAN channels are identical across all of the applicable When using On most Wi-Fi routers these days, this is set automatically, but for some larger applications it is necessary to set the channels manually, or at least under central control.

Wi-Fi routers often use two bands to provide dual band Wi-Fi, the 2. The table given below provides the frequencies for the total of fourteen Not all of these channels are available for Wi-Fi installations in all countries.

As a result the Wi-Fi channels overlap and it can be seen that it is possible to find a maximum of three non-overlapping ones. Therefore if there are adjacent pieces of WLAN equipment, for example in a Wi-Fi network consisting of multiple access points that need to work on non-interfering channels, there is only a possibility of three.

There are five combinations of available non overlapping channels are given below:. From the diagram above, it can be seen that Wi-Fi channels 1, 6, 11, or 2, 7, 12, or 3, 8, 13 or 4, 9, 14 if allowed or 5, 10 and possibly 14 if allowed can be used together as sets.

Often WiFi routers are set to channel 6 as the default, and therefore the set of channels 1, 6 and 11 is possibly the most widely used. As some energy spreads out further outside the nominal bandwidth, if only two channels are used, then the further away from each other the better the performance.

It is found that when interference exists, the throughput of the Wi-Fi installation is reduced. Simultaneous Dual band router - They provide more speed and flexibility as they can work with both bands at the same instant. But most budget modems with built-in Wi-Fi routers lack various features, so it is recommended to use an individual router and modem since it is cheaper too.

Another reason to use a separate Wi-Fi router and modem is that the modems with built-in Wi-Fi routers can get unstable under heavy load because of the heat produced. Anyone within Wi-Fi range can use your broadband for free if it is left unprotected. So it is recommended to have your Wi-Fi network password-protected so as to prevent any unknown person from using it. Hiding your Wi-Fi network name is the best and effective way of protecting a wireless network from strangers.

Hiding its name, known as Server Set Identifier SSID , means that when any unknown person searches for wireless connectivity, the router will not show your Wi-Fi network name, so if no one can see it, no one can access it. If you or any known person wants access, you need to manually enter your Wi-Fi network name every time, which can be complicated. It is secure, progressive, and the most ordinary protocol out there.

It is often mandatory. Personal mode allows it's users to set a password within the characters. If nothing is determined, then [] is automatically used. For small office and home users where information or data is encrypted, using a bit key before sending- personal mode is used.

It is not recommended to use Enterprise mode for small offices and homes as it has advanced security standards. Content is for informational or entertainment purposes only and does not substitute for personal counsel or professional advice in business, financial, legal, or technical matters. I didn't read the information but, judging by all the comments, I think if I had read the information it would have helped me a lot:. Social Networking.

Internet Culture. Internet Entertainment. Internet Security. Internet Browsers. Computer Repairs. What this means is that the access point will actually run two wireless networks at the same time, one for each radio band. The two networks will work side by side completely without interference between the two radio bands. A lot of manufacturers have started using a somewhat unofficial naming convention or rating for their products to clarify what the products can do and which transfer speeds that they support.

The rating contains a number showing the theoretical maximum throughput that the device supports, and will also indirectly show if the access point supports simultaneous dual band or not. If you are buying a You would then get the benefit of getting a router with simultaneous Dual Band where you can use the 5GHz band for higher throughput. You might also look to the newer The latest Wi-Fi standard as of is called All But whereas So buying an The new increased transfer speeds of The data streams of Devices compatible with That is why you can reach much higher speeds with If one stream is used you can reach Mbps.

Two streams equal Mbps and three streams Mbps. To reach those speeds, both MIMO and wider channels are used. The maximum channel width for Newer