Refer to the exhibit. A network administrator has configured R1 as shown. When the administrator checks the status of the serial interface, the interface is shown as being administratively down. What additional command must be entered on the serial interface of R1 to bring the interface up?
- IPv6 enable
- clockrate 128000
- no shutdown
Answers Explanation & Hints:
By default all router interfaces are shut down. To bring the interfaces up, an administrator must issue the no shutdown command in interface mode.