The defense-in-depth principle may include security measures of the following layers. Which layer is LEAST relevant?
A) Application security
B) External network security
C) Host security
D) Internal network security
E) Perimeter security

Question

Quizplus · Accepted Answer

While all the layers are important in defense-in-depth, external network security is the least relevant because it is further away from protecting the core assets of the system. This layer protects the perimeter, but the other layers protect deeper into the system.

The Defense-In-Depth Principle May Include Security Measures of the Following