Spooky! - Knock, Knock... Who's there? - Hardware Backdoor knocking

Hardware backdoor <https://en.wikipedia.org/wiki/Hardware_backdoor>

DuckDuckGo search for: 'counterfeit-CISCO-switches'

<https://html.duckduckgo.com/html?q=counterfeit%2DCISCO%2Dswi...>

DuckDuckGo search for: 'fake-CISCO-routers-and-switches'

<https://html.duckduckgo.com/html?q=fake%2DCISCO%2Drouters%2D...>