Bob is the lead cybersecurity analyst for a large multinational corporation that relies

heavily on its enterprise office network for daily operations. The Chief Information Officer

$(CIO)$ has expressed concerns about the increasing sophistication of cyber threats and

the need to ensure the highest level of security for the organization's network. As part of

Bob's role, he is tasked with conducting a comprehensive network security assessment

and proposing strategies to enhance the overall security posture of the enterprise office

network.

a$)$ Provide TWO $(2)$ network security protocols implemented at different layers of the

TCP$/$IP stack.

$(2$ Marks$)$

b$)$ Explain how each protocol contributes to the overall security of the network.

$(4$ Marks$)$

c$)$ Explain FOUR $(4)$ security controls that can be implemented to enhance the security

of the enterprise office network.

$(4$ Marks$)$