allows cloud controller to locate instances on separate zones to boost redundancy.

Router___ allows the cloud controller to locate instances on separate zones to boost redundancy.

Explanation:

A router, as a networking device, forwards data packets between one computer network and other networks.  With a router, one can use wired and wireless devices to connect to the Internet.  Unlike a modem, which connects the home network to a wider internet, a router can enable the networks to interact with one another without using the Internet.

this does not make any sense.. i you can reword that i can maybe you