Use the built-in help (?) to find a command that states it will "negate a command". This is commonly used in combination with other commands to reverse what that command does under normal conditions. Using this command, how can the hostname you just set be removed? 11. Banners are welcome messages that are often displayed by systems and network devices when users log into them. In production networks, banner content may have a significant legal impact on the organization. For example, a friendly "Welcome" message may be interpreted by a court that an attacker has been granted permission to hack into the router. A banner should include information about authorization, penalties for unauthorized access, connection logging, and applicable local laws. The corporate security policy should provide policy on all banner messages. Using the built-in help system, examine the different banner modes that can be entered, and write down the available banner modes and their description: 12. When you use a command to create a banner (which can extend over multiple lines) you need a way to indicate where the banner message ends. Typically, you specify this on thebanner command line as a special character that won't appear anywhere in the banner message, for example, the % character. When you enter this character at any point, you are specifying that this is the end of the banner. Create an motd banner on your router that contains 2-lines of text, and then write down that command, and everything you entered up to and including the end-of-banner marker: