CCNA Exam 642-551
Title: Securing Cisco Network Devices
Ver: 02.28.07

Example Question out of 62 Questions:

What is a reconnaissance attack?
A. when an intruder attacks networks or systems to retrieve data, gain access, or escalate access privileges.
B. when an intruder attempts to discover and map systems, services, and vulnerabilities
C. when malicious software is inserted onto a host in order to damage a system, corrupt a system, replicate itself, or deny service or access to networks, systems, or services
D. when an intruder attacks your network in a way that damages or corrupts your computer system, or denies you and other access to your networks, systems, or services
E. when an intruder attempts to learn user IDs and passwords that can later be used in identity theft

Answer: B
Explanation: Attackers and hackers can employ social engineering techniques to pose as legitimate people seeking out information.