Cisco CCNA 640-802 exam is an entry-level, single option exam for achieving the CCNA certification. It validates your ability to Configure, verify and troubleshoot switches, Identify security threats to a network and to mitigate those threats and Implement, verify, and troubleshoot networks in a medium-size Enterprise branch office network. Passing this test will also help you in achieving the CCNP and CCIE certifications. You can also get the CCNA certification through a two tests option. For this, you have to take tests 640-822 and 640-816. Is CCNA 640-802 exam right for you? The 640-802 test is appropriate for you if you have a basic understanding of computers and networking technology. There are no specific prerequisites for this test, although it is recommended that you should have at least some experience in implementing and administering networks.