802.11 Networks consist of Wireless Hosts, Access Points (APs) and Wireless links
Wireless does not always mean mobility.
802.11 does not provide IP address mobility
Your application must monitor association status and re-associate with the same AP or another if necessary! See section 2.5 Connecting to the Network for more information.
Access Points (APs)
In a typical home access network, the AP function is combined with switch and router functionality in a single device, such as the Linksys E1200.
Wireless Link Characteristics
- Decreased signal strength: radio signal attenuates as it propagates through matter (path loss)
- Interference from other sources: standardized wireless network frequencies (e.g., 2.4 GHz) shared by other devices (e.g., phone); devices (motors) interfere as well
- Multipath propagation: radio signal reflects off objects ground, arriving at destination at slightly different times
These characteristics can lead to a variable latency of data transfer, directly impacting the performance of the application.