Today you reviewed a router’s physical connections, startup process, and basic software operation—in essence, the heart and soul of internetwork communications. When somebody asks you how data gets from her home to a server, you can now provide a one-word answer: routers. If she needs more information, read her this chapter. We will discuss WAN connectivity more on Day 3. You can further review the topics from today on pages 192–216 and 219–250 of CCNA Flash Cards and Exam Practice Pack (CCENT Exam 640-822 and CCNA Exams 640-816 and 640-802), Third Edition.