单项选择题
On a Cisco Catalyst 4500 Series, the fail LED is lit for one if its two power supplies. Which command would you use to check on this problem ?（）
A. Show module
B. Show errdisable detect
C. Show environment
D. Show diagnostic content
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A Catalyst switch has just been installed and configured, and is not working as expected. You have decided to capture multiple show command outputs to study. Which one command could you use that includes the output of many other show commands, such as show version and show running-config?（）
A. show configuration
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As an experienced Network Engineer, you are required to implement the security architecture assessment. Which of the following statement describes the most important reason for that?（）
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