This means wifi 802.11 b g n. All existing standards of Wi-Fi networks

One of the most important settings for a wireless network is "Operation Mode", "Wireless LAN Mode", "Mode", etc. The name depends on the router, firmware, or control panel language. This item in the router settings allows you to set certain regime wi-Fi operation (802.11). Most often, this is b / g / n mixed mode. Well, ac if you have a dual band router.

To determine which mode is best to choose in the router settings, you must first figure out what it is and what these settings affect. I think it would not be superfluous to take a screenshot with these settings for an example tP-Link router... For 2.4 and 5 GHz bands.

At the moment, there are 4 main modes: b / g / n / ac... The main difference is the maximum connection speed. Please note that the speed I will write about below is the maximum possible speed (in one channel). Which can be obtained in ideal conditions. In real life, the connection speed is much slower.

IEEE 802.11 Is a set of standards on which all Wi-Fi networks operate. In fact, this is Wi-Fi.

Let's take a closer look at each standard (in fact, these are Wi-Fi versions):

• 802.11a - When I wrote about the four main modes, I did not consider it. It is one of the first standards to operate in the 5 GHz band. Maximum speed 54 Mbps. Not the most popular standard. Well, old already. Now in the 5 GHz range the ac standard already "rules".
• 802.11b - works in the 2.4 GHz band. Speed \u200b\u200bup to 11 Mbps.
• 802.11g - we can say that this is a more modern and refined standard 802.11b. It also works in the 2.4 GHz band. But the speed is already up to 54 Mbps. Compatible with 802.11b. For example, if your device can work in this mode, then it will easily connect to networks that work in mode b (older).
• 802.11n Is the most popular standard today. Speed \u200b\u200bup to 150 Mbps in the 2.4 GHz range and up to 600 Mbps in the 5 GHz range. 802.11a / b / g compatible.
• 802.11ac - a new standard that only works in the 5 GHz band. Data rates up to 6.77 Gbps (with 8 antennas and MU-MIMO mode)... This mode is available only on dual-band routers that can broadcast the network in the 2.4 GHz and 5 GHz bands.

Connection speed

As practice shows, most often the b / g / n / ac settings are changed in order to increase the speed of the Internet connection. Now I will try to explain how it works.

Let's take the most popular 802.11n standard in the 2.4 GHz band, when the maximum speed is 150 Mbps. This number is most often indicated on the box with the router. Also, there may be written 300 Mbit / s, or 450 Mbit / s. It depends on the number of antennas on the router. If there is one antenna, then the router works in one stream and the speed is up to 150 Mbit / s. If there are two antennas, then two streams and the speed is multiplied by two - we already get up to 300 Mbit / s, etc.

These are all just numbers. In real conditions, the speed over Wi-Fi when connected in 802.11n mode will be 70-80 Mbps. Speed \u200b\u200bdepends on a huge number of very different factors: interference, signal strength, performance and load on the router, settings, etc.

Since they have many versions of the web interface, we will consider several of them. If in your case there is a light web interface as in the screenshot below, then open the "Wi-Fi" section. There will be a "Wireless Mode" item with four options: 802.11 B / G / N mixed, and separately N / B / G.

Or even like this:

Configuring "802.11 Mode".

The radio frequency range on the Netis router

Open the settings page in a browser at http://netis.cc. Then go to the "Wireless Mode" section.

There will be a "Radio Frequency Range" menu. In it, you can change the standard of the Wi-Fi network. The default is "802.11 b + g + n".

Nothing complicated. Just remember to save the settings.

Setting up a Wi-Fi network mode on a Tenda router

The settings are located under "Wireless Mode" - "Basic WIFI Settings".

Item "Network Mode".

You can put both mixed mode (11b / g / n), and separately. For example, only 11n.

If you have a different router or settings

It is simply impossible to give specific instructions for all devices and software versions. Therefore, if you need to change the standard of the wireless network, and you did not find your device above in the article, then see the settings in the section titled "Wireless network", "WiFi", "Wireless".

If you don’t find it, write your router model in the comments. And it is desirable to attach another screenshot from the control panel. I will tell you where to look for these settings.

If you're looking for the fastest WiFi you need 802.11ac, it's simple. Basically, 802.11ac is an accelerated version of 802.11n (the current WiFi standard that your smartphone or laptop uses), offering link acceleration from 433 megabits per second (Mbps) to several gigabits per second. To achieve speeds that are dozens of times faster than 802.11n, 802.11ac operates exclusively in the 5GHz band, uses huge bandwidth (80-160MHz), operates with 1-8 spatial streams (MIMO), and uses a kind of technology called "beamforming" (beamforming). To learn more about what 802.11ac is and how it will eventually replace wired Gigabit Ethernet for home and work, we'll talk a bit later.

How 802.11ac works.

Several years ago, 802.11n introduced some interesting technology that significantly increased speed over 802.11b and g. 802.11ac works in much the same way as 802.11n. For example, while the 802.11n standard supported up to 4 spatial streams, and channel widths up to 40MHz, 802.11ac can use 8 channels, and the widths up to 80MHz, and their combination can produce 160MHz at all. Even if everything else remains the same (and it won't), this means that 802.11ac operates 8x160MHz spatial streams, compared to 4x40MHz. A huge difference that will allow you to squeeze out huge amounts of information from radio waves.

To further boost throughput, 802.11ac also introduced 256-QAM modulation (versus 64-QAM in 802.11n), which literally compresses 256 different signals of the same frequency, offsetting and intertwining each one into a different phase. In theory, this increases the spectral efficiency of 802.11ac by a factor of 4 over 802.11n. Spectral efficiency is a measure of how well a wireless protocol or multiplexing technique uses the bandwidth available to it. In the 5GHz band, where the channels are wide enough (20MHz +), the spectral efficiency is not so important. In cellular bands, however, channels are most often 5 MHz wide, making spectral efficiency extremely important.

802.11ac also introduces standardized beamforming (802.11n had it but was not standardized, making interoperability a problem). Beamforming essentially transmits radio signals in such a way that they are directed towards a specific device. This can improve the overall bandwidth, and make it more consistent, and also reduce power consumption. You can form a beam using a smart antenna, which physically moves in search of a device, or by modulating the amplitude and phase of the signals, so that they destructively interfere with each other, leaving a narrow, non-interfering beam. 802.11n uses the second method, which can be applied by both routers and mobile devices. Finally, 802.11ac, like previous versions 802.11 is fully backward compatible with 802.11n and 802.11g, so you can buy an 802.11ac router today and it will work great with your devices with older WiFi devices.

802.11ac range

In theory, at 5MHz and using beamforming, 802.11ac should have the same or better range (beaming) than 802.11n. The 5MHz band, due to its lower penetrating power, does not have the same range as 2.4GHz (802.11b / g). But this is a trade-off that we have to make: we simply will not have enough spectral bandwidth in the massively used 2.4GHz band to allow the maximum speed of 802.11ac reaching gigabit levels. As long as your router is in an ideal location, or you have several, don't worry. As always, more important factor is the transmission of the power of your devices, and the quality of the antenna.

How fast is 802.11ac?

Finally, the question everyone wants to know is how fast is WiFi 802.11ac? As usual, there are two answers: the theoretically achievable speed in the laboratory, and the practical speed limit that you are likely to be content with at home in the real world, surrounded by a bunch of jamming obstructions.

The theoretical maximum speed of 802.11ac is 8 channels of 160MHz 256-QAM, each of which is capable of 866.7Mbps, which gives us 6.933Mbps, or a modest 7Gbps. The transfer rate of 900 megabytes per second is faster than transferring to a SATA 3 drive. In the real world, due to the clogging of the channel, you most likely will not get more than 2-3 160 MHz channels, so the maximum speed will stop somewhere at 1.7-2.5 Gbps. Compared to 802.11n's theoretical maximum speed of 600Mbps.

802.11ac Apple Airport Extreme Disassembled by Highest Performance iFixit Router Today (April 2015) Includes D-Link AC3200 Ultra Wi-Fi Router (DIR-890L / R), Linksys Smart Wi-Fi Router AC 1900 (WRT1900AC), and Trendnet AC1750 Dual-Band Wireless Router (TEW-812DRU) as reported by the PCMag website. With these routers, you should definitely expect impressive speeds from 802.11ac, but don't bite off your Gigabit Ethernet cable for now.

In Anandtech's 2013 benchmark, they tested a WD MyNet AC1300 802.11ac router (up to three streams) paired with a number of 802.11ac devices that supported 1-2 streams. The fastest transfer rates were achieved by an Intel 7260 laptop with an 802.11ac wireless adapter, which used two streams to achieve 364Mbps at a distance of just 1.5m. At 6m and over the wall, the same laptop was the fastest, but the top speed was 140MB / s. The fixed speed limit for the Intel 7260 was 867MB / s (2 streams at 433MB / s).

For situations where you do not need the maximum performance and reliability of wired GigE, 802.11ac is truly attractive. Rather than cluttering your living room with an Ethernet cable running to your home theater from your PC under your TV, it makes more sense to use 802.11ac, which has enough bandwidth to deliver the highest definition wireless content to your HTPC. For all but the most demanding cases, 802.11ac is a very worthy replacement for Ethernet.

The future of 802.11ac

802.11ac will get even faster. As we mentioned earlier, the theoretical maximum speed of 802.11ac is a modest 7Gbps, and until we get there in the real world, we shouldn't be surprised at the 2Gbps mark in the next few years. At 2Gbps, you get a transfer rate of 256Mbps, and suddenly Ethernet will be used less and less until it disappears. To achieve these speeds, chipset and device manufacturers will have to figure out how to implement four or more channels for 802.11ac, given how softwareand hardware.

We present how Broadcom, Qualcomm, MediaTek, Marvell and Intel are already making strong strides in providing 4-8 channels for 802.11ac to integrate the latest routers, access points, and mobile devices... But until the 802.11ac specification is finalized, a second wave of chipsets and devices is unlikely to emerge. Device and chipset manufacturers will have to do a lot of work to ensure that advanced technologies such as beamforming are compliant and fully compatible with other 802.11ac devices.

The basic standard IEEE 802.11 was developed in 1997 to organize wireless communication over a radio channel at a speed of up to 1 Mbit / s. in the frequency range 2.4 GHz. Optionally, that is, if there were special equipment on both sides, the speed could be raised to 2 Mbps.
Following it, in 1999, the 802.11a specification was released for the 5 GHz band with a maximum achievable speed of 54 Mbps.
After that, WiFi standards were divided into two used bands:

2.4 GHz band:

The used radio frequency band is 2400-2483.5 MHz. divided into 14 channels:

802.11b- the first modification of the basic Wi-Fi standard with speeds of 5.5 Mbit / s. and 11 Mbps. It uses DBPSK and DQPSK modulations, DSSS technology, Barker 11 and CCK coding.
802.11g- a further stage of development of the previous specification with a maximum data transfer rate of up to 54 Mbit / s (real at the same time 22-25 Mbit / s). Backward compatible with 802.11b and wider coverage. Used: DSSS and ODFM technologies, DBPSK and DQPSK modulation, arker 11 and CCK coding.
802.11n - at the moment, the most modern and fastest WiFi standard, which has a maximum coverage in the 2.4 GHz range, and is also used in the 5GHz spectrum. Backward compatible with 802.11a / b / g. Supports channel widths of 20 and 40 MHz. The technologies used are ODFM and ODFM MIMO (Multiple Input Multiple Output). The maximum data transfer rate is 600 Mbit / s (while the real efficiency is on average no more than 50% of the declared one).

5 GHz band:

The used radio frequency band is 4800-5905 MHz. divided into 38 channels.

802.11a - the first modification of the basic IEEE 802.11 specification for the 5GHz radio frequency range. Supported speed - up to 54 Mbps. The technology used is OFDM, BPSK, QPSK, 16-QAM modulation. 64-QAM. The encoding used is Convoltion Coding.

802.11n - Universal standard WiFi supporting both frequency bands. It can use both 20 and 40 MHz channel widths. The maximum achievable speed limit is 600 Mbps.

802.11ac - this specification is now actively used on dual-band WiFi routers... Compared to its predecessor, it has the best zone coverage and much more economical in terms of power supply. The data transfer rate is up to 6.77 Gb / s, provided that the router has 8 antennas.
802.11ad - the most modern Wi-Fi standard for today, which has additional band 60 GHz.. Has a second name - WiGig (Wireless Gigabit). The theoretically achievable data transfer rate is up to 7 Gbps.

WiFi 802.11 standards are developed by the IEEE (Institute of Electrical and Electronic Engineers)

IEEE 802.11 is a basic standard for Wi-Fi networks that defines a set of protocols for the lowest transfer rates.

IEEE 802.11 b - describes b about higher transfer rates and introduces more technology restrictions. This standard has been widely promoted by WECA (Wireless Ethernet Compatibility Alliance ) and was originally calledWi-Fi .
Frequency channels in the 2.4GHz spectrum are used ().
Ratified 1999.
RF technology used: DSSS.
Coding: Barker 11 and CCK.
Modulations: DBPSK and DQPSK,
Maximum data transfer rates (transfer) in the channel: 1, 2, 5.5, 11 Mbps,

IEEE 802.11 a - describes significantly higher transfer rates than 802.11b.
Frequency channels in the 5GHz frequency spectrum are used. ProtocolNot compatible with 802.11b.
Ratified 1999.
RF technology used: OFDM.
Coding: Convoltion Coding.
Modulations: BPSK, QPSK, 16-QAM, 64-QAM.
Maximum data transfer rates in the channel: 6, 9, 12, 18, 24, 36, 48, 54 Mbps.

IEEE 802.11 g - describes data rates equivalent to 802.11a.
Frequency channels are used in the 2.4GHz spectrum. The protocol is compatible with 802.11b.
Ratified in 2003.
RF technologies used: DSSS and OFDM.
Coding: Barker 11 and CCK.
Modulations: DBPSK and DQPSK,
Maximum data transfer rates (transfer) in the channel:
- 1, 2, 5.5, 11 Mbps on DSSS and
- 6, 9, 12, 18, 24, 36, 48, 54 Mbps on OFDM.

IEEE 802.11n - the most advanced commercial WiFi standard, currently officially approved for import and use in the Russian Federation (802.11ac is still in the process of being developed by the regulator). 802.11n uses frequency channels in the WiFi 2.4GHz and 5GHz frequency spectra. Compatible with 11b / 11a / 11 g ... Although it is recommended to build networks with a focus only on 802.11n, since requires configuration of special protection modes when backward compatibility with legacy standards is required. This leads to a large increase in signaling information anda significant decrease in the available useful performance of the radio interface. Actually, even one WiFi 802.11g or 802.11b client will require special configuration of the entire network and its immediate significant degradation in terms of aggregated performance.
The WiFi 802.11n standard itself was released on September 11, 2009.
Supports WiFi frequency channels 20MHz and 40MHz (2x20MHz).
RF technology used: OFDM.
The OFDM MIMO (Multiple Input Multiple Output) technology is used up to the 4x4 level (4xTransmitter and 4xReceiver). At the same time, at least 2xTransmitters per Access Point and 1xTransmitter per user device.
Examples of possible MCS (Modulation & Coding Scheme) for 802.11n, as well as the maximum theoretical data transfer rates (transfers) in the radio channel are presented in the following table:

Here SGI is the guard interval between frames.
Spatial Streams is the number of spatial streams.
Type is the type of modulation.
Data Rate is the maximum theoretical data transfer rate in the radio channel in Mbit / s.

It is important to emphasizethat the indicated speeds correspond to the channel rate concept and are the limit value using this set of technologies within the described standard (in fact, these values, as you probably noticed, are also written by manufacturers on the boxes of home WiFi devices in stores). But in real life, these values \u200b\u200bare not achievable due to the specifics of the WiFi 802.11 technology itself. For example, "political correctness" in terms of providing CSMA / CA ( wiFi devices are constantly listening to the air and cannot transmit if the transmission medium is busy), the need to acknowledge each unicast frame, the half-duplex nature of all WiFi standards and only 802.11ac / Wave-2 will be able to bypass this with, etc. Therefore, the practical efficiency of outdated 802.11 standards b / g / a never exceeds 50% under ideal conditions (for example, for 802.11g, the maximum speed per subscriber is usually not higher than 22Mb / s), and for 802.11n, the efficiency can be up to 60%. If the network operates in a protected mode, which often fails due to the mixed presence of various WiFi chips on various devicesah in the network, then even the indicated relative efficiency can drop by 2-3 times. This concerns, for example, a mix of Wi-Fi devices with 802.11b, 802.11g chips in a network with WiFi 802.11g access points or WiFi 802.11g / 802.11b devices in a network with WiFi 802.11n access points, etc. More about ...

In addition to the main WiFi 802.11a, b, g, n standards, additional standards exist and are used to implement various service functions:

. 802.11d... To adapt various WiFi devices to specific country conditions. Within the regulatory field of each state, the ranges are often different and can be different even depending on the geographic location. The WiFi IEEE 802.11d standard allows frequency band regulation in devices from different manufacturers using special options introduced into the media access control protocols.

. 802.11e... Describes classes qoS quality for transferring various media files and, in general, various media content. Adaptation of the MAC layer for 802.11e, determines the quality, for example, of the simultaneous transmission of sound and image.

. 802.11f... Aimed at unifying the parameters of Access Points wi-Fi standard different manufacturers. The standard allows the user to work with different networks when moving between the coverage areas of separate networks.

. 802.11h... It is used to prevent creating problems for meteorological and military radars by dynamically reducing the radiated power of Wi-Fi equipment or dynamically switching to another frequency channel when a trigger signal is detected (in most European countries, ground stations for tracking meteorological and communication satellites, as well as military radars, operate in bands close to 5 MHz). This standard is necessary requirement ETSI for equipment approved for use in the European Union.

. 802.11i... The first versions of the WiFi 802.11 standards used the WEP algorithm to secure Wi-Fi networks. It was assumed that this method could provide privacy and protect the transmitted data of authorized users of the wireless network from eavesdropping, which can now be broken in just a few minutes. Therefore, in the 802.11i standard, new methods of protecting Wi-Fi networks were developed, implemented both at the physical and software levels. Currently, it is recommended to use Wi-Fi Protected Access (WPA) algorithms to organize a security system in Wi-Fi 802.11 networks. They also provide compatibility between wireless devices of various standards and modifications. WPA protocols use advanced RC4 encryption scheme and mandatory authentication method using EAP. Sustainability and safety modern networks Wi-Fi is defined by privacy check protocols and data encryption (RSNA, TKIP, CCMP, AES). The most recommended approach is to use WPA2 with AES encryption (and don't forget about 802.1x with highly desirable tunneling mechanisms such as EAP-TLS, TTLS, etc.). ...

. 802.11k... This standard is actually aimed at implementing load balancing in the radio subsystem of a Wi-Fi network. Usually wireless local network the subscriber unit usually connects to the access point that provides the strongest signal. This often leads to network congestion at one point, when many users connect to one Access Point at once. To control such situations in the 802.11k standard, a mechanism is proposed that limits the number of subscribers connected to one Access Point, and makes it possible to create conditions under which new users will connect to another AP even though weak signal from her. In this case, the aggregated network bandwidth is increased due to more efficient use of resources.

. 802.11m... Corrections and corrections for the entire 802.11 group of standards are combined and summarized in a separate document collectively called 802.11m. The first release of 802.11m was in 2007, then in 2011, and so on.

. 802.11p... Defines the interaction of Wi-Fi equipment moving at speeds up to 200 km / h past fixed Points WiFi access, remote at a distance of up to 1 km. Part of the Wireless Access in Vehicular Environment (WAVE) standard. The WAVE standards define an architecture and an additional set of service functions and interfaces that provide a secure radio communication mechanism between moving vehicles. These standards are designed for applications such as the organization road traffic, traffic safety control, automated collection of payments, navigation and routing of vehicles, etc.

. 802.11s... A standard for the implementation of mesh networks (), where any device can serve as both a router and an access point. If the closest access point is congested, data is redirected to the closest unloaded node. In this case, a packet of data is transferred (packet transfer) from one node to another until it reaches its final destination. This standard introduces new protocols at the MAC and PHY layers that support broadcast and multicast transmission (transfer), as well as unicast delivery over a self-configuring Wi-Fi access point system. For this purpose, the standard introduces a four-address frame format. Examples of implementation of WiFi Mesh networks:,.

. 802.11t... The standard was created to institutionalize the testing process for IEEE 802.11 solutions. Testing methods, methods of measurement and treatment of results (treatment), requirements for testing equipment are described.

. 802.11u... Defines the procedures for the interaction of Wi-Fi networks with external networks. The standard should define access protocols, priority protocols and prohibitions on working with external networks. At the moment around of this standard a large movement has been formed both in terms of developing solutions - Hotspot 2.0, and in terms of organizing inter-network roaming - a group of interested operators has been created and is growing, which jointly solve roaming issues for their Wi-Fi networks in dialogue (WBA Alliance). Read more about Hotspot 2.0 in our articles: , .

. 802.11v... The standard should be developed amendments aimed at improving the network management systems of the IEEE 802.11 standard. Modernization at the MAC and PHY levels should allow centralizing and streamlining the configuration of client devices connected to the network.

. 802.11y... Additional communication standard for the frequency range 3.65-3.70 GHz. Designed for devices last generationoperating with external antennas at speeds up to 54 Mbit / s at a distance of up to 5 km in open space. The standard is not fully completed.

802.11w... Defines methods and procedures for improving the protection and security of the Media Access Control (MAC) layer. The protocols of the standard structure a system for controlling the integrity of data, the authenticity of their source, the prohibition of unauthorized reproduction and copying, data confidentiality and other means of protection. The standard introduces management frame protection (MFP: Management Frame Protection), and additional security measures allow you to neutralize external attacks such as, for example, DoS. A little more on MFP here:,. In addition, these measures will provide security for the most sensitive network information that will be transmitted over networks supporting IEEE 802.11r, k, y.

802.11ac. A new WiFi standard that only operates in the 5GHz frequency band and provides significantly about higher speeds for both individual WiFi client and WiFi Hotspot. For more details, see our article.

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Ways to increase the connection speed and stability of the Wi-Fi wireless network using the IEEE 802.11n standard

Many modern devicesthat we use (smartphone, tablet, laptop, router, TV) are able to work with wireless Wi-Fi networks. The most widespread at the moment is the IEEE 802.11n standard.

Users periodically have questions about the speed and stability of devices over Wi-Fi. The most common ones are:

• Why in status wireless connection is the maximum connection speed displayed, but the actual baud rate is much lower?
• Why when connecting wireless adapter 802.11n-capable 54 Mbps or lower?
• Where is the promised speed of 300 Mbps (or 150 Mbps) when connected wireless devices on the 802.11n standard?
• How do I properly configure my wireless devices to operate efficiently, consistently, and at their fastest speeds, while taking full advantage of the IEEE 802.11n standard?

1. Maximum data transfer rate and connection speed (channel speed) are different concepts.

Let's start with the fact that many users mistakenly focus on the connection speed in megabits per second, which is displayed in the line Speed (Speed) on the tab Are common (General) in the window condition (Status) wireless connection in Windows operating system.

It is wrong to think that this value represents the real bandwidth of a particular network connection. This figure displayed by the wireless adapter driver and shows the connection speed on physical level is currently used within the selected standard, that is operating system reports only about the current (instant) physical connection speed of 300 Mbit / s (it is also called channel speed), but the real bandwidth of the connection during data transmission can be much lower. The actual data transfer rate depends on many factors, in particular on the settings of the 802.11n access point, the number of wireless client adapters connected to it at the same time, etc. The difference between the connection speed shown by Windows and the real indicators is primarily due to the large volume of service data, losses network packets in a wireless environment and retransmission costs.

To get a more or less reliable value of the actual data transfer rate in a wireless network, you can use one of the following methods:

• Start copying in Windows large file and then calculate the speed at which this file was transferred using the file size and transfer time (Windows 7 long copy to additional information window calculates a fairly reliable speed).
• Use special utilities, eg LAN Speed \u200b\u200bTest or NetMeter to measure throughput.
• Network administrators can recommend the program Iperf(cross-platform console client-server program).

Download:

2. The benefits of 802.11n only work for 802.11n adapters.

802.11n uses a variety of technologies, including MIMO, to achieve higher throughput, but they are only effective with 802.11n clients. Remember, using an 802.11n wireless access point will not improve the performance of existing 802.11 clients. b / g.

3. When testing the speed of Wi-Fi, it is necessary to turn off all devices on the network, except for the tested ones (especially outdated standards).

An 802.11n access point wireless network can use legacy devices. An 802.11n access point can work simultaneously with 802.11n adapters and with older 802.11g and even 802.11b devices. The 802.11n standard provides for legacy support mechanisms. 802.11n client performance slows down (50-80%) only when slower devices are actively sending or receiving data. For achievement maximum performance (or at least testing it) for an 802.11n wireless network, only clients of this standard are recommended.

4. Why is the connection speed only 54 Mbps or lower when the 802.11n adapter is connected?

Most 802.11n devices will experience up to 80% bandwidth degradation when using legacy WEP or WPA / TKIP security methods. The 802.11n standard specifies that high performance (over 54 Mbps) cannot be achieved if one of the above methods is used. The only exceptions are devices that are not certified for the 802.11n standard.

If you don't want to get a speed reduction, use only WPA2 wireless security method with AES (IEEE 802.11i security standard).
Attention! Using an open (unsecured) network is unsafe!

In some cases, when using an 802.11n Wi-Fi adapter and an 802.11n wireless access point, only 802.11g is connected. This can also happen due to the fact that WPA2 technology with TKIP protocol is preinstalled in the default access point in the wireless security settings. Again, a recommendation: in the WPA2 settings, use the AES algorithm instead of the TKIP protocol, and then the connection to the access point will be made using the 802.11n standard.

Other possible reason connection only on the 802.11g standard is that the access point settings use the auto-detection mode (802.11b / g / n). If you want to establish a connection on the 802.11n standard, then do not use auto-sensing 802.11b / g / n mode, but manually set to use 802.11n only. But remember that in this case, 802.11b / g clients will not be able to connect to the wireless network, except for 802.11n clients.

5. Make sure the access point and adapter support and enable WMM.

To obtain a speed over 54 Mbps, the mode must be enabled. WMM (Wi-Fi Multimedia).
The 802.11n specification requires 802.11e (Quality of Service QoS to improve wireless performance) support in order to use HT (High Throughput) mode. speeds over 54 Mbps.

WMM support is required for devices that will be 802.11n certified. We recommend enabling WMM mode by default in all certified Wi-Fi devices (access points, wireless routers, adapters).
Please note that WMM must be enabled on both the access point and the wireless adapter.

The WMM mode in the settings of various adapters can be called differently: WMM, Multimedia, WMM Capable, etc.

6. Disable the use of the 40 MHz channel.

The 802.11n standard provides for the use of wideband channels - 40 MHz for increased throughput.

But in reality, when changing the channel width from 20 MHz to 40 MHz (or using the automatic channel width selection "Auto 20/40" in some devices), you can even get a decrease, not an increase in bandwidth. A drop in throughput and unstable connections can occur in spite of the link speed figures, which are 2 times higher when using a 40 MHz channel width.
The real benefits of using a 40 MHz channel (in particular, an increase in throughput from 10 to 20 Mbps), as a rule, can be obtained only in conditions of a strong signal. If the signal level drops, then the use of the 40 MHz channel becomes much less efficient and does not provide an increase in throughput.
When using a 40 MHz channel and weak level signal throughput can be reduced by up to 80% and not result in the desired increase in throughput.

If you decide to use a 40 MHz channel and at the same time notice a decrease in the speed (not the channel speed of the connection, which is displayed in the web configurator in the menu System monitor, and the speed of loading web pages or receiving / transmitting files), we recommend using a 20 MHz channel. In this case, you can increase the bandwidth of the connection.
In addition, it is possible to establish a connection with some devices when using a 20 MHz channel (when using a 40 MHz channel, the connection is not established).

7. Please use the latest wireless adapter driver.

Slow connection speeds can also be due to poor compatibility of drivers from different Wi-Fi equipment manufacturers. There are often cases when installing a different version of the wireless adapter driver from its manufacturer or from the manufacturer of the chipset used in it, you can get a significant increase in speed.

Increase wireless speed Wi-Fi Keenetic some Apple devices may change country to United States. This can be done via the web configurator in the menu Wi-Fi network on the T tab 5 GHz access point or 2.4 GHz access point in field A country.

Do not forget that to work wireless networks Wi-Fi is also influenced by other factors (for example, the location of devices and the distance between them, the direction of the antennas, the presence of a large number of Wi-Fi devices operating within the range of your device and using the same frequency range, etc.).

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