Cisco IOS Software Commands

A firewall or router is not normally something to play with. That is to say that after you have it properly configured, you will tend to leave it alone until there is a problem or you need to make some other configuration change. This is the reason that the question mark (?) is probably the most widely used Cisco IOS Software command. Unless you have constant exposure to this equipment, it can be difficult to remember the numerous commands required to configure devices and troubleshoot problems. Most engineers remember enough to go in the right direction but will use the ? to help them use the correct syntax. This is life in the real world. Unfortunately, the question mark is not always available in the testing environment. Many questions on this exam require you to select the best command to perform a certain function. It is extremely important that you familiarize yourself with the different commands and their respective functions.

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