Just like a Mac and AirPort base station, network modems and routers use built-in software (called firmware) in conjunction with hardware to provide network services, such as Internet or email access. In order to function properly, you should make sure that the firmware installed on your modem or router is up-to-date. If it isn't up-to-date, you may encounter issues when trying to connect to the device, or when connecting to the Internet via the device.