n Spread Spectrum LANs use RF bands that are allocated to wireless nets by FCC, signal is spread by transmitting a chirp pattern, receiver accepts signals it can decode. RF-noisy environment.
nWireless LANs topologies - see Figure 6.5
n1. Peer Level System: Each
unit communicated with every
other unit. Low cost and no master control needed. Breaks
down as traffic grows.
n2. Centrally Controlled
System (client-server): Central
controller is linked to a wired LAN. Control
unit handles all communications, and has centralized network management and access control.