I have a modem/router that came with my ISP and I have two Airport Express. I have the Airports so I can extend my signal further.
My current setup is: Modem -> ethernet -> Airport Express 1 -> wireless -> Airport Express 2.
On the Airport Express 1 - I can either create a new wireless network for AE2 to connect to, or I can join the modems connection.
What advantages / disadvantages do I have to creating a new wireless network on AE1 vs. joining the existing one from the modem?