You already have a network, and can access the Internet over it?
What I did to add wireless to my network was get a wireless router, configure it to get the DHCP information from my wired router, and then added it as one of the devices connected to my router. So my network is:
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What I did to add wireless to my network was get a wireless router, configure it to get the DHCP information from my wired router, and then added it as one of the devices connected to my router. So my network is:
With the wired router doing all the DHCP assignments.