Send us Fan Mail One video hotline feels like a single, simple conversation until you trace the call path and realise there may be seven companies involved in making it work. That’s the spark for this training-focused breakdown of CISSP Domain 4.3 secure communication channels, using the viral AI “actress hotline” story to show how modern voice and video collaboration really behaves behind the curtain. We start with a practical analogy: you think you’re transacting with the waiter, but your ...