Which of the following represents the main causes of Computer-Aided Design and Drafting (CADD) application bottlenecks? Choose all that apply.

A.
Network traffic congestion.

B.
CPU speed.

C.
Disk I/O operations.

D.
All of the above.

Explanation:
The main causes of Computer-Aided Design and Drafting (CADD) application bottlenecks is network traffic congestion and disk I/O operations. CPU speed is not one of the main concerns any longer, basically due to the usage of faster and multiple processors.
Incorrect
Answers:
B: CADD application bottlenecks are no longer usually caused by CPU speed. This is essentially due to the usage of faster and multiple processors.

D: Option B is not part of the correct answer.
References:
Charles J. Brooks, Server+ Certification Exam Cram 2 (Exam SK0-002), QUE Publishing, Indianapolis, 2006, pp. 528-530.