After a year as a senior network administrator, you have been promoted to work in the security
department of a large global Tier One ISP. You are to spend one month in training on security
issues, concepts, and procedures. The third day in your new position, the ISP is hit with a DDoS
attack from over 100,000 computers on the Internet. While the department works to manage the
attack, you monitor the impact on the network. What is the impact to the ISP when hit with a DDoS
such as this?

A.
The attack compromises internal IP addresses of clients.

B.
The attack denies legitimate users the ability to access legitimate resources.

C.
The attack compromises internal email addresses of clients in the network.

D.
The attack creates a loop of data, where requests for resources are routed to a different
location.

E.
The attack will cause (due to the large number of computers involved) the IDS to crash and no
longer log network activity.