Advantages and Disadvantages of 802.11ac?

Nowadays the usage of the internet has increased, especially wifi, there are several series of generations have come to give services. With the increase in usage of the internet, the speed of the internet has also reduced. Even people using 4G, there also users faced speed issues. When coming to the wireless connection this is a common issue compared to the wired connection. Previously we use the 4G also IEEE 802.11n, with the increase in the number of users this 4G has given better support by proving a better speed rate but day by day usage of the internet is increased and again the number of users came up with the same speed rate issue. To support many users with faster speed IEEE has released the next series of IEEE 802.11n i.e; is IEEE 802.11ac. The enhancement in the series makes people feel a fast speed rate.

What is IEEE 802.11ac?

IEEE 802.11ac is the upgraded version of the IEEE 802.11n and it is from WLAN standards. It improves the speed rate, especially in the wireless local area networks. It withstands with its speed rate in gigabytes even with the increases of users. It can perform some operations when there is a low-speed rate. The operations like the opening of Gmail and downloading of files all are supported with even less speed. Its enhanced features improve more number of WIFI users with a better experience like high throughput, more bandwidth, less delay rate, etc.

The new version of WIFI technology has its advantages and disadvantages.


  • 802.11ac improves the network capacity by supporting the multi-user -MIMO (multiple inputs and multiple outputs) this router can communicate with multiple wireless devices at a time.

  • Even though when the number of users increases it supports a better bandwidth.

  • It gives better throughput even if the distance and number of users are more.

  • It uses orthogonal frequency division multiplexing which is the data rate.

  • It has backward compatibility which means it supports the current version as well as the previous version too.

  • It supports nearly 8 spatial streams, to reduce the unnecessary signal passing in all directions instead it makes signals pass in required directions.

  • Speed is the highest benefit in this, which give nearly a speed rate of 6.93 Gbps.

  • The speed measures in Gbps only whereas previously specified in Mbps.

  • In the upgraded version the wifi speed increased from 20% to 30% and supports 256QAM.

  • It supports high-frequency bands of 2.4GHZ of frequency.

  • It has a high-speed rate which is far range from the previous version’s supported speed.

  • It supports a wider bandwidth when compared to previous versions.

  • Also, it has less interference for transmission and has more transmission capacity.

  • With its performance user experience and the number of users are increased.


  • Speed is not common for all wireless devices, it varies from device to device.

  • The performance also varies from device to device.

  • The infrastructure that it supports is more expensive.

  • Even though it supports MIMO, it supports downlink, not uplink.

  • It doesn’t support high modulations but only supports small lengths for symbols.

  • When there are more devices, it may affect the throughput also the existence of collisions and performance reduces.

  • While communicating the signals may get interfere with the nearby networks.


When the technology improves the number of users for that technology also increases. This IEEE 802.11ac has many new features compared with the older versions, especially the speed rate, bandwidth capacity, supporting MIMO downlink, and performance. With all these features users get a better experience, which leads to a rise in usage. While accessing the speed rate is the key element, this updated version came with a high-speed rate, especially for wireless devices that will satisfy many user requirements.

Updated on: 05-May-2023


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