802.11n

802.11n

An IEEE 802.11 Wi-Fi standard that increases transmission speeds to 600 Mbps and works in both the 2.4 GHz and 5 GHz frequency bands (see dual-band router). Although newer 802.11ac devices began to proliferate in 2013, 802.11n is expected to exist for some time because 11n speed is more than adequate for most purposes when only one or two users are transmitting at the same time.

Multiple Antennas (MIMO)
The 802.11n technology brought the use of multiple antennas, improving distance, reliability and speed. Up to four data streams can be sent simultaneously using 20MHz or 40MHz channels, providing a theoretical maximum data rate of 600 Mbps. See MIMO.

"Wi-Fi CERTIFIED n" and Draft-2.0
The official "Wi-fi CERTIFIED n" standard was ratified in 2009; however, the Wi-Fi Alliance released a preliminary "Draft-2.0" specification in 2007, also called "Draft-N," to promote interoperability among early equipment. Even before Draft-N, vendors offered "Pre-N" products. See MIMO, 802.11 and 802.11ac.


Pre-N Equipment
Prior to Draft 2.0, Belkin released this wireless router with two transmitters and three receivers to deliver up to 108 Mbps. As non-certified devices, both sides of the transmission had to be Belkin equipment. (Image courtesy of Belkin Corporation, www.belkin.com)
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References in periodicals archive ?
The IEEE 802.11n standard, which is the fourth generation Wireless Local Area Network (WLAN), has developed in Physical (PHY) and Medium Access Control (MAC) layers.
Hunan, China, August 03, 2017 --(PR.com)-- The JetWave 3220 is an EN50121-4 Industrial Dual 802.11n 2.4G/5G 2T2R MIMO Wireless AP/Bridge which features 802.11n 2T2R MIMO doubles data rate up to 300Mbps per radio; The JetNet 5428G is an Industrial 24+4G Gigabit Managed Ethernet Switch which supports Advanced Cyber Security functions such as DHCP Snooping, IP Source Guard, Dynamic ARP Inspection, Denial of Service (DoS) protection, and L2/L3/L4 Access Control List (ACL); The JetNet 3008 is an Industrial 8-port Fast Ethernet Switch which features 2.0Gbps Switch Fabric with excellent data exchange performance.
Both BiPAC 4400CRL-Q (4G LTE WiFi 802.11n CPE Router) and BiPAC 4400CRVL-Q2 ( 4G LTE WiFi 802.11n VoIP CPE Router) support 11n technology with wireless speed up to 300Mbps.
The Cypress CYW43438 combo solution reportedly provides robust 802.11n Wi-Fi for developers to connect their applications to the Internet, along with advanced coexistence algorithms enabling simultaneous Bluetooth 4.1 operations such as audio streaming and low-power Bluetooth Low Energy (BLE) connections to smartphones, sensors and other low-power devices.
Designing and Deploying 802.11 Wireless Networks: A Practical Guide to Implementing 802.11n and 802.11ac Wireless Networks for Enterprise-Based Applications, 2nd Edition
Firstly, a customer can have either two embedded 4G/LTE modules with one Wi-Fi 802.11n module or secondly, the other way around, one 4G/LTE module with two Wi-Fi 802.11n modules.
Garrison said, "We could have kept with 802.11n and that would have been fine, but we want this infrastructure to last five to eight years.
While the benefits of these market trends are fuelling new applications, operational efficiencies and business value, the security challenges presented by these trends make it impossible for legacy 802.11n WLAN security systems to protect sensitive data, meet compliance requirements, and secure the enterprise.
Summary: Dell has introduced the new SonicPoint AC Series of wireless access points, which supports the high-performance IEEE 802.11ac wireless standard to deliver almost three times that of the last wireless standard (802.11n).
Indeed, it seems that most enterprises still manage just fine with their still-perfectly-viable 802.11n kit, or even their ageing 802.11b/g/n devices.