1. Right Answer: C
Explanation: Single sign-on is an authentication process that allows a user to access multiple application with one set of login credentials.
2. Right Answer: D
Explanation: Follow-up actions are not a common category of remediation activity because it is post-report delivery activity. This may include conducting additional tests using different resources or tools than what were included in the scope of the original test.
3. Right Answer: B
Explanation: Network Scanning is a method of obtaining network information such as information about hosts, ports, and running services by scanning the networks and its ports.
4. Right Answer: C
Explanation: User enumeration is the concept in which an attacker tries to recover valid usernames from a web application. The web applications are commonly vulnerable to this kind of an attack on registration form pages, login pages, or password reset pages.
5. Right Answer: D
Explanation: Host, web pages and server, groups, email, user, social networking sites and token are the types of enumeration except debugging.