It means end of the classic BLACKER firewall/VPN model, however. No more "trusted" red network behind firewall/VPN gateway (aka "blacker") separating it from t

It means end of the classic BLACKER firewall/VPN model, however. No more "trusted" red network behind firewall/VPN gateway (aka "blacker") separating it from the untrusted black network. The metaphorical firewall is there on every endpoint.