In your own words, what is a router interface? Provide some different examples of router interfaces. What are some different commands we can use to provide information about interfaces on a router? Using your text and outside resources, list at least three Cisco router commands used for troubleshooting, and explain the purpose and output of each command. How do we configure an IP address on a Cisco router interface? Provide an example of the steps involved. What if we need to change that IP address? Delete the IP address? Using outside resources, discuss at least three different Cisco routers used today. Briefly compare and contrast each.