The range of a home Wi-Fi LAN depends on the wireless
access point (WAP) or wireless router being used. Factors
that determine a particular WAP or wireless router's range
are:
* the specific 802.11 protocol employed
* the overall strength of the device transmitter
* the nature of obstructions and interference in the
surrounding area
A general rule of thumb in home networking says that
802.11b and 802.11g WAPs and routers support a range of up
to 150 feet (46 m) indoors and 300 feet (92 m) outdoors.
Another rule of thumb holds that the effective range of
802.11a is approximately one-third that of 802.11b/g.
Both of these rough estimates fall on the high end of the
range seen in practice. Obstructions in home such as brick
walls and metal frames or siding greatly can reduce the
range of a Wi-Fi LAN by 25% or more. Because 802.11a
employs a higher signalling frequency than 802.11b/g,
802.11a is most susceptible to obstructions. Interference
from microwave ovens and other equipment also affects
range. 802.11b and 802.11g are both susceptible to
these