The CCNA Routing and Switching Exam Cram Personal Test Center provides CCNA candidates with a sophisticated test engine and unique browser interface to practice for the CCNA Routing and Switching exam (640-507). Users gain valuable insight into their readiness and test their knowledge with 250 practice questions on topics such as configuring Frame Relay, upgrading Cisco IOS from flash memory, and mastering IP addressing. Practice test questions can be taken in two modes, Review and Actual. Review Mode gives a brief explanation of why the right answers are right and the wrong answers are wrong, and Actual Mode simulates the live exam and does not provide explanations. This product is distributed through an efficient Web download and does not come with a CD.