Ac does not recommend a wireless connection, but it will work. Setting up your laptop is similar to the ipad or iPhone.
If your Comcast is similar to mine, it has one (or two 2.5 and 5GHz) wireless networks for the office and a guest line. Hopefully you have WPA2 encryption with a complex password. Once you log in you can connect to the server as you would any other computer. You will probably need to put the the appropriate passwords for this to occur.
You may have significant degradation in speed by going wireless. Perhaps not if you are close and running N or AC on both the router and laptop. But it can be done.
