Wireless networking (specifically WiFi) involves several hurdles not found in wired networking:
- A wireless network is not as secure because physical access to the switch is not necessary.
- Wireless networks' signals get significantly weaker with distance because of the inverse square law (at least concerning WiFi), as well as being subject to interference (specifically, from microwaves, which run on the same frequency as WiFi).
Wireless Network is normally done over WiFi (wireless fidelity), however, cell networks and light-based networks are also considered wireless networks.
Cell networks are typically wans as opposed to lans. Light-based networks are entirely experimental and probably will not reach the market in the near future.