VPNs & Firewalls
"Figure 12-6: VPN and Firewall Deployment" (page 250), Nayak, U., & Rao, U. H. (2014). The InfoSec handbook: An introduction to information security (1st ed.). APRESS.
These notes by Miriam Briskman are licensed under CC BY-NC 4.0 and based on sources.