A:Answer This does not have anything to do with Mesh systems. Mesh systems are designed to eliminate WIFI dead spots. Extending the WIFI signal without loss of router speed. IF I have one 5300 router and one 1200 router then the 1200 router, in Mesh mode, would maintain the 5300's transmission speeds up and down as determined by your ISP. Now if you wanted to be sure you were getting the best up and down speeds you could use the Power line adapter to allow the 2nd "mesh" router to utilize the connection as a backhaul freeing up WIFI traffic on your network. What Is A Ethernet Backhaul? With a wired Ethernet backhaul, you connect the access points together using ethernet network cables. This opens up an additional channel for communication between the access points and thus takes some of the load of the wireless bandwidth. In my house I can get a 1 gigabit ethernet connection over the cabling, which is actually a higher throughput than the wireless signal, so it more than doubles capacity.