What are the default names of worksheets?

A security administrator is observing congestion on the firewall interfaces and a high number of half open incoming connections from different external IP addresses. Which of the following attack types is underway?

A. Cross-site scripting B. SPIM C. Client-side D. DDoS

____ is the process of performing a comprehensive search on the possible solution space by throwing all computational power an attacker can gather at breaking the system.

A. Brute force B. Dictionary attack C. Meet-in-the-middle D. Man-in-the-middle