There was a time not too long ago when billion dollar purchases of tech companies didn’t happen all the time. There was a time not too long ago when billion dollar purchases were never done completely with cash. Those days are behind us with the latest billion dollar acquisition being happening with Cisco buying Meraki, an enterprise wifi startup. The company started as a research project at the Massachusetts Institute of Technology in 2006. They now supply larger organizations the infrastructure, hardware, software, and support to operate secure wifi networks on premises. Instead of having…