For those who are on Verizon FIOS and have a MI424-WR router,
1. Login to the Router UI and find the Private IP address of your ATV 3 under My Network.
2. Click on Advanced button and then on Local Administration and check the box Using Primary Telnet Port (23) and Apply.
3. Telnet to your router's IP address as admin/YourAdminPassword.
4. Type system shell at the router prompt. This will put you into a Unix shell.
5. Now netstat should be an available command to check connections.
I will investigate BusyBox and see how to put tcpdump/wireshark/iftop onto the router (DD-WRT may be an option).
In my case, Verizon may have a cache that I am hitting. I do not see any traffic to any CDN.