is this a different wifi network or does it just increase the signal strength?
Will you be able to hook up your devises to the current wifi network or will you have to select the wifi booster as the wifi network? Will this create another wifi network?
Yes, the NETGEAR - Universal Wi-Fi Range Extender will create a new network, named same as your existing network, with the suffix "-ext" added. So you will be able to sign into your new network or the old network.