单项选择题
Which command do you use to navigate to [edit interfaces]?（）
A. cd interfaces B. dir edit interfaces C. edit interfaces D. interfaces
单项选择题 What is an advantage of dynamic routing?（）
单项选择题 In the MAC address 00:90:69:9f.ea:46, what represents the Organizationally Unique Identifier (OUI)?（）
单项选择题 Which J-Web lab do you use lo add licenses to the device?（）
