A typical noise floor value in the 2.4GHz band can be anywhere from -80 dBm to -110 dBm depending on

Complaints about poor WiFi performance are one of the biggest issues facing the average internet jailbreak ios 6 user right now. With most people now relying jailbreak ios 6 on phones, tablets and laptops for their Internet fix, the days of a cabled Ethernet connection being the norm is well and truly over. Unlike a cabled Ethernet connection which offers a guaranteed level of performance, WiFi is incredibly jailbreak ios 6 complex with many variables jailbreak ios 6 that will impact performance and reliability. Dealing with wireless performance issues is a nightmare for the helpdesk of the average Internet Service Provider (ISP), with poor speeds being one of the biggest complaints jailbreak ios 6 from customers, and something they can do very little about as it s something they have absolutely no control jailbreak ios 6 over.
First off lets be very clear with one thing. jailbreak ios 6 WiFi is not, and never will be a replacement for a cabled Ethernet connection. It will always be a convenient, complementary jailbreak ios 6 solution. Unless the laws of physics are changed at some point in the future there will never be an exception to this rule.
The first WiFi capable devices first appeared in the market in the late 90s with a standard known as 802.11b, offering headline theoretical speeds of up to 11Mbps. From the 802.11b standard the 802.11g standard was created, delivering an improved headline theoretical speed of 54Mbps. By 2009 the 802.11n jailbreak ios 6 standard was ratified, delivering headline speeds jailbreak ios 6 of up to 300Mbps, and by 2011 we were seeing the first 802.11ac gear promising headline speeds of up to 867Mbps (or even greater from some vendors).
The issue of theoretical vs real world throughput jailbreak ios 6 is something that we need to cover here. Every headline wireless speed you see mentioned, whether it be 11Mbps, 54Mbps, 150Mbps, 300Mbps or 867Mbps is a theoretical jailbreak ios 6 maximum speed. For various reasons it s impossible for these sorts of speeds to ever be achieved in in the real world, primarily because they don t take into account any overheads that exist in the WiFi protocol at Layer 1, and overheads at Layer 2 and Layer 3 in the open systems interconnection (OSI) model which form the basis of all data communications. They also don t factor in WiFI being a half duplex medium, meaning that a WiFi device can t transmit and receive data at the same time. It has to (very quickly) jailbreak ios 6 alternate between both, much like two people talking on a walkie talkie. This differs to an Ethernet connection which is full duplex and can transmit and receive data at the same time like two people having a real world conversation. As you re transferring data across your WiFi connection you ll be using one of  two data protocols, Transmission Control Protocol (TCP) or User Datagram Protocol (UDP ). Because TCP relies on an acknowledgement (ACK) packet (think of a walkie jailbreak ios 6 talker user responding to every message saying they re received it before the other person can send their next message), TCP performance over WiFi will typically be significantly less than UDP performance as UDP does not rely on ACK packets.
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.
Lets start by explaining the most important jailbreak ios 6 principal of radio communications - noise floor . Unless you live somewhere with no neighbours within a 20km radius (or live inside a faraday cage ), you re continually being exposed to a myriad of radio waves from other wireless networks along with other sources of RF interference such as microwave ovens, cordless jailbreak ios 6 phones, mobile phones, video senders, jailbreak ios 6 baby monitors, and Bluetooth devices. Noise floor (like signal strength) is measured in dBm . dBm uses a logarithmic scale for measurement.
A typical noise floor value in the 2.4GHz band can be anywhere from -80 dBm to -110 dBm depending on the level of background noise in your environment from other sources. When you connect a WiFi device to a WiFi access point or router you ll likely see an indication of signal strength on your device, typically showing bars. This shows a good approximation of signal strength, jailbreak ios 6 but isn t telling you the full st