Communication with servers deals with three different protocols.
Vera Controller System
Vera has two mainstay communication systems, that are available on all Vera Controllers. They are Z-Wave and IP (the Internet Protocol, as used in Wi-Fi and LAN connections.) Most of its security sensors such as door/window sensors and motion detectors use Z-Wave, because it requires very little power, and can also run on a small battery for a year or more. With some brilliantly built-in security, the product is very robust.
Technically, Z-wave is comprised of a ‘mesh network’ which is highly redundant ensuring that the signals get through in time.
Most security cameras use Wi-Fi/LAN IP connections since they provide the required bandwidth (number of bits per second) needed to send video signals then and there. Depending on the Vera Controller model you have in mind, you can opt for bridges which are optional accessories.
Finally, you have Zigbee which is used to control devices that have home control communication protocols. These Zigbee enabled devices usually have a low-power mesh network technology.