DIRECTV® uses CDNs, so unless you do a trace route, you wont now where your content is coming from. Mine is coming from Limelight
But yes, my set up works flawlessly. My set up includes 1 HR44, 2 HR24s and 2 HR21s. Connection is done via the HR44 which is connected via ethernet to my Apple Airport Extreme router which connects to an Arris Modem