enable: This command is used to enter the privileged EXEC mode. Example of syntax: enable.

configure terminal: This command is used to enter the global configuration mode. Example of syntax: configure terminal.

hostname: This command is used to set the router's hostname. Example of syntax: hostname $.$

interface: This command is used to enter the interface configuration mode. Example of syntax: interface $.$

ip address: This command is used to set the IP address for an interface. Example of syntax: ip address $.$

no shutdown: This command is used to activate the interface. Example of syntax: no shutdown.

exit: This command is used to exit the current configuration mode. Example of syntax: exit.

show running$-$config: This command is used to display the current configuration. Example of syntax: show running$-$config.

show interfaces: This command is used to display the status of the interfaces. Example of syntax: show interfaces.

copy running$-$config startup$-$config: This command is used to save the current configuration to the startup configuration file. Example of syntax: copy running$-$config startup$-$config.