Chapter 20
1. B. The Power-On Self-Test is the first phase of the boot process on a Cisco router. This ensures there is an inventory of functional hardware components in place on the device.
2. B. The first step in the process of locating a Cisco IOS image is to check the boot field of the configuration register. This value instructs the router whether to load ROMMON or IOS, and if IOS, specifically the steps to take to find the IOS to load. This first step (the boot field) usually instructs the router to use the image file in flash.
3. D. The show version command is a simple way to verify the location and image file name of the operating system that your Cisco router is running. Of the other answers, only show running-config is a valid command. ...
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