[qb45]

I think your parent didn't mean that "JunOS is just software networking on BSD" but that "software networking on BSD is all that can be trusted because NSA screws commercial products".

And of course it doesn't have to be NSA. Maybe some foreign spies or pretty much anybody interested in spying on some Juniper's customers.

Or even a bored employee doing it for bragging rights. FWIW, I once worked for a (reasonably big) corp making software which has to run as root and I'm pretty sure I'd have been able to slip some small privilege escalation backdoor in there if I felt like doing so. But I have to admit that their products weren't as security critical (and, actually, already had some vulns), so one could hope that Juniper and Cisco are better than that.