Yes, A switch is designed to give machines access to the LAN. The switch you are purchasing is a 5 port. So your Netgear will have a WAN and LAN port. Connect the internet cable to the WAN port on the netgear then get a seperate cable to connect to the LAN port on the netgear and port 1 on the switch.
I normally say internet cable to determine the cable that gives direct internet access.
Your router can take ADSL which may look more like a phone cable plugged into the ADSL port on the Netgear. However it may also be an ethernet cable as you stated plugged into the WAN port.