This command reference permits you to quickly brush up on any commands that might be relevant for your CCNA Exam. Use this as a reference, or if you prefer, run through all of the commands from A to Z to help further prepare you for exam day!
access-list 1 permit 172.16.1.0 0.0.0.255: This global-configuration command creates a standard ACL; note here the number is 1 and the permitted source addresses are 172.16.1.0 0.0.0.255
banner login #: This command is done in global-configuration mode, and it sets a banner message to display before the username: login prompt; note that the special character is your choice and will end the banner entry
cdp enable: This interface-level command enables CDP on an interface