No, Netflix's applications would have users of that ISP use the CDN server which they would locate within SK Telecom's network. Netflix calls it their Open Con

No, Netflix's applications would have users of that ISP use the CDN server which they would locate within SK Telecom's network. Netflix calls it their Open Connect Appliance: https://openconnect.netflix.com/en/appliances/ https://openconnect.netflix.com/en/appliances/ That server would, of course, have a connection to the Internet, they push logs to AWS and get updates from Netflix's authoritative servers in Netflix's other datacenters, but they also serve HTTPS connections to thousands of ISP users; the upstream traffic would be minimal.