Correct Answer: A,B,C,E
Explanation/Reference:
A: The downside to TLS is that it only protects data in transit, or "point-to-point". Once data is received, it is no longer protected.
B: Point to point security is often used as a default or minimal security option in order to protect messages over insecure networks.
C: A lesser alternative to end to end security is point to point security. This is used to protect messages in transit. It assumes that other means of security are used to protect messages during processing and persistence.
Generally, less effort is made to protect data behind the corporate firewall.
This opens up a number of vulnerabilities and risks to an organization.
E: SSL/TLS is not so hard to set up. It is popular.
Reference: Oracle Reference Architecture, Security , Release 3.1