In the real world a 802.11b network will deliver maximum speeds of around 5Mbps, a 802.11g network will typically deliver maximum speeds of around 20Mbps, a 802.11n network will with 20Mhz channels (N150) will typically deliver maximum speeds of around 40Mbps, a 802.11n network with 40Mhz channels (N300) will typically deliver maximum speeds of around 80Mbps, and a 802.11ac network will typically deliver between 100Mbps and 350Mbps depending on channel width and the brand of hardware you’re using. These are all maximum real world speeds, and in the real world issues such as signal strength and congestion from other wireless networks will mean you may not get speeds anywhere near these - these issues are exactly what I’ll get onto next. Understanding what impacts WiFi performance isn’t straight forward as many of the key factors rely on a level of radio frequency (RF) engineering and protocols, however I’ll attempt to try to explain a few of the major concepts in something resembling simple English.

OrangeDragon wrote:He goes on to explain why you're real world experience may be even less speed than you're paying digi/opennet for... because of a lot of interference issues..