Please design and draw a Simple network architecture that allows users in the untrusted domain to communicate with systems in the trusted domain employing the use of Boundary Router, SMPT Server, Firewall(s) and DMZ. Explain your design from a security perspective. From the design also add sensor point indicators on your design to show where you would sniff traffic with one or more Network-Based Intrusion Detection Systems (NIDS). Explain what the reasoning is (what you expect to detect) from a security perspective. Are there any potential drawbacks to consider?