ccna top learn

ccna top learn.The CLI allows you to simplify commands and arguments to the point where uniqueness is assured, which is helpful for those who have difficulty entering them. For example, to switch from user EXEC mode to privileged EXEC mode, enter en instead of enable, as follows.I0S> en IOS#The Cisco device will complete the command for you. However, the characters entered to specify the command must be unique; for example, you cannot enter just the letter e,10.3.2 Context-Related Helpbecause there are other commands that begin with the letter e, such as exit.Another powerful feature of IOS is context-sensitive help. Context-sensitive help is supported in all I0S modes, and this includes user EXEC mode, privileged EXEC mode, and configuration mode. You can use this feature in a variety of ways. If you are not sure which command you need to execute, you can enter help at the prompt or ? , and the Cisco device displays a list of commands that can be executed in the current mode along with a brief description of each command. The following is the output obtained by executing the command in user EXEC mode in the router CLI.Router> ? Exec commands: access-enable cdCreate a temporary Access-List entry clear Change current device Reset functionsExam Essentials To obtain context-sensitive help, use the command help or ? Alternatively. the commands can be simplified to the point where uniqueness is assured. If at the bottom of the screen you see . .More... . this indicates that there is additional help information that cannot be accommodated on the current screen. On Cisco devices.Pressing the space bar will display the next screen of help information; pressing the Enter key will scroll down one line; pressing any other key will end the display of help information. To get more detailed help information, enter a space and ? after a command or parameter. to have the CLI list all the options and arguments that the command contains. For example, to see all the arguments to the command erase, enter erase. space and ?