The number of simultaneous connections, and even the type of wireless security can affect and slow down some older routers with inadequate processors/memory. In addition, net IP layer throughput of WiFi is typically 60% of the air link rate due to WiFi being half- duplex with ACKs, and being CSMA/CA. Theoretical wireless speeds (combined upstream and downstream) are as follows: 802.11b - 11 Mbps (2.4GHz) 802.11a - 54 Mbps (5 GHz) 802.11g - 54 Mbps (2.4GHz) 802.11n - 600 Mbps (2.4GHz and 5 GHz) - 150Mbps typical for network adapters, 300Mbps, 450Mbps, and 600Mbps speeds when bonding channels with some routers 802.11ac - 1300+Mbps (5 GHz) - newer standard that uses wider channels, QAM and spatial streams for higher throughput Actual wireless speeds vary significantly from the above theoretical maximum speeds due to: distance - distance from the access point, as well as any physical obstructions, such as walls, signal-blocking or reflecting materials affect signal propagation and reduce speed interference - other wireless networks and devices in the same frequency in the same area affect performance shared bandwidth - available bandwidth is shared between all users on the same wireless network. Below is a breakdown of the various 802.11 WiFi standards and their corresponding maximum speeds. You can check our bits/bytes conversion calculator for reference. First, keep in mind that in data communications, speed is measured in kilo bits (or mega bits) per second, designated as kbps, or Mbps.
There are many wireless standards in use today, and newer technologies can bond multiple channels/frequencies together to achieve higher throughput.
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