Many organizations implement assurance layering strategies to mitigate the risks they face to acceptable levels. One such strategy is the Three Lines of Defense model.
a. Describe the first and second lines of defense included in this model.
b. Explain what distinguishes the third line of defense from the first two.
c. Discuss how the three lines of defense are coordinated.
d. Identify the external sources of assurance that organizations use to augment their internal lines of defense.