Can wireless networks be used to replace wired networks?

It is not to replace an existing wired network with a wireless network. Wireless networks are currently based on 11Mbps or 54Mbps and is a shared access medium. As you move away from the installed access point, the wireless access speed will drop automatically to compensate for the weaker signal. BCC wired network allows access for 100Mbps, depending on your building wire infrastructure.  more

Not in an optimum way, no. Wireless networks are currently based on 11Mbps speed and are a shared access medium. In addition, distance from APs impacts the availability of wireless networks to all users.