31 Days Before Your CCENT Certification

Summary

Protocols at the application layer define what services you can access on a network. The protocols at the following layers define how, when, where, and how quickly the information can be sent and received. A web page or file can be sent in sporadic spurts over a network, but voice and video require a more steady, reliable, and, frankly, expensive connection. You can further review the topics from today on pages 39–68 of CCNA Flash Cards and Exam Practice Pack (CCENT Exam 640-822 and CCNA Exams 640-816 and 640-802), Third Edition.