The answer is user EXEC mode. This is for setting, viewing, and testing system processes. In common, the user EXEC commands let you to link to remote devices, modify terminal line settings on a temporary basis, perform basic tests, and list system information. This also used by common system administrators, while the privileged EXEC mode is used by the root administrator. Use the enable and disable instructions to shift between the two levels. Access to the user-level EXEC command line needs a valid password.
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Some proteins must be altered before they become functional.
