You have been assigned to address the network security aspects of the ABC Company against external attacks. In your response, address the followings.

1. Select and explain which computing/network devices/services should be placed in DMZ: including router, firewall, mail relay, database server, web server, or authenticationserver.

2. Discuss the use of data encryption, digital signatures and two-factor authentication with case examples.

3. Recommend a relevant security protocol to ensure the confidentiality of transmissions in a business to customer (B2C) financial web application.

6marks question ,answer briefly