What Is 802.11n - Wifi N type-

802.11n is the next generation of Wi-Fi® wireless technology. Boasting huge improvements in range, speed and performance, 802.11n provides a high-speed wireless connection at distances never before possible while enabling a strong wireless signal throughout your entire home.

Range

Older wireless networks can fade out at distances as short as 100 feet. 802.11n devices maintain a connection at distances greater than 300 feet—giving you three times the range while delivering revolutionary speed.

Speed

With a real world data throughput of 160 Mbps or faster, 802.11n is seven times faster than current 802.11g technology, handling gaming, streaming HD video, music and VoIP with ease.

Safe to Buy

802.11n is backwards compatible with prior 802.11 standards (802.11b, 802.11g) and is designed to accommodate any future changes. This means that 802.11n devices are safe to buy now.

Security

With WPA and WPA2, the best home Wi-Fi security options available, 802.11n maintains the security needed to protect network traffic. And with one-touch installation, full security can be activated with the touch of a button.

source: 80211n.com

please note that a white paper on Wifi N type is attached.