Social engineering attacks can occur in person, over the phone, while surfing the Internet, and via email. If you're planning on taking the Security+ exam, you should have a good understanding of the common attacks.
Here's a sample Security+ question related to attacks:
Q. A security administrator at a shopping mall discovered two wireless cameras pointing at an automatic teller machine. These cameras were not installed by mall personnel and are not authorized. What is the MOST likely goal of these cameras?
B. Dumpster diving
D. Shoulder surfing
Can you answer the question? The answer and explanation is available here.