802.11ac

802.11ac is a wireless networking standard developed by the Institute of Electrical and Electronics Engineers (IEEE) and published in 2013 by the IEEE Standards Association. This standard is also known as Wi-Fi 5 and is designed to provide high-speed wireless connectivity, particularly in the 5 GHz frequency band, as used by Apple, Google, and Microsoft. The development of 802.11ac was influenced by the work of Vint Cerf, Bob Kahn, and other pioneers in the field of Internet Protocol (IP) and Transmission Control Protocol (TCP), who worked at Stanford University and Massachusetts Institute of Technology (MIT). The standard has been widely adopted by manufacturers such as Cisco Systems, Intel, and Qualcomm, and is used in various devices, including Samsung smartphones and Amazon tablets.

Introduction

The 802.11ac standard is an evolution of the earlier 802.11n standard, which was introduced in 2009 and provided a significant increase in wireless networking speeds. The new standard is designed to provide even faster speeds, with a maximum theoretical throughput of up to 1.3 Gbps (gigabits per second), as demonstrated by University of California, Berkeley and Carnegie Mellon University researchers. This is achieved through the use of advanced technologies such as Multiple-Input Multiple-Output (MIMO) and Beamforming, which were developed by Bell Labs and IBM Research. The standard is also designed to provide better performance in environments with a high density of wireless devices, such as coffee shops and airports, as seen in New York City and London. Companies like Facebook and Twitter have also adopted 802.11ac to provide fast and reliable wireless connectivity to their users.

History

The development of the 802.11ac standard began in 2011, when the IEEE 802.11 working group started discussing the need for a new standard that could provide faster speeds and better performance. The standard was developed in collaboration with industry leaders such as Broadcom, Marvell Technology Group, and Texas Instruments, which are headquartered in San Jose, California, and Dallas, Texas. The first draft of the standard was published in 2012, and the final version was approved in 2013 by the Federal Communications Commission (FCC) and the European Telecommunications Standards Institute (ETSI). The standard has since been widely adopted by manufacturers and is used in a wide range of devices, including laptops from Dell and HP, and smartphones from LG and Sony. The development of 802.11ac was also influenced by the work of Tim Berners-Lee, who invented the World Wide Web while working at CERN.

Technical Specifications

The 802.11ac standard uses the 5 GHz frequency band, which provides a higher bandwidth and less interference than the 2.4 GHz band used by earlier standards. The standard supports a maximum of 8 spatial streams, each with a maximum throughput of up to 433.3 Mbps (megabits per second), as demonstrated by University of Oxford and University of Cambridge researchers. The standard also supports Channel Bonding, which allows for the combination of multiple channels to provide a higher throughput, as used by Netflix and Amazon Prime Video. The standard is designed to be backward compatible with earlier standards, such as 802.11n and 802.11g, which were developed by IEEE 802.11 working group and are used by NASA and European Space Agency. Companies like Google and Microsoft have also developed devices that support 802.11ac, such as Google Pixel and Microsoft Surface.

Advantages and Improvements

The 802.11ac standard provides several advantages and improvements over earlier standards, including faster speeds, better performance, and improved reliability. The standard is designed to provide a more efficient use of bandwidth, which allows for a higher number of devices to be connected to a single network, as seen in Tokyo and Seoul. The standard also supports advanced technologies such as Quality of Service (QoS) and Wireless Multimedia Extensions (WME), which were developed by Cisco Systems and Intel. These technologies provide a higher priority to critical applications such as video streaming and online gaming, which are used by Twitch and YouTube. The standard is also designed to provide better security features, such as WPA2 (Wi-Fi Protected Access 2) and AES (Advanced Encryption Standard), which were developed by National Institute of Standards and Technology (NIST) and are used by US Department of Defense.

Deployment and Compatibility

The 802.11ac standard has been widely adopted by manufacturers and is used in a wide range of devices, including routers from Linksys and Netgear, and access points from Cisco Systems and HP. The standard is also supported by a wide range of operating systems, including Windows 10 from Microsoft, macOS from Apple, and Android from Google. The standard is designed to be compatible with earlier standards, such as 802.11n and 802.11g, which allows for a smooth transition to the new standard, as seen in New York City and London. Companies like Facebook and Twitter have also adopted 802.11ac to provide fast and reliable wireless connectivity to their users. The standard has also been adopted by educational institutions such as Harvard University and Stanford University.

Security Features

The 802.11ac standard provides several security features, including WPA2 (Wi-Fi Protected Access 2) and AES (Advanced Encryption Standard), which were developed by National Institute of Standards and Technology (NIST) and are used by US Department of Defense. The standard also supports advanced technologies such as IEEE 802.1X and EAP (Extensible Authentication Protocol), which were developed by IEEE 802.1 working group and are used by NASA and European Space Agency. These technologies provide a higher level of security and authentication, which is critical for applications such as online banking and e-commerce, which are used by Amazon and eBay. The standard is also designed to provide better protection against cyber attacks and malware, which are a major concern for computer security experts at MIT and Stanford University. Companies like Google and Microsoft have also developed security features that support 802.11ac, such as Google Safe Browsing and Microsoft Defender. Category:Wireless networking