单项选择题
In the MAC address 00:90:69:9f.ea:46, what represents the Organizationally Unique Identifier (OUI)?（）
A. 69:9f.ea:46 B. 00:90:69:9f C. 9f:ea:46 D. 00:90:69
单项选择题 Which J-Web lab do you use lo add licenses to the device?（）
单项选择题 Which statement is true about terms in a policy?（）
单项选择题 By default, which character indicates the UNIX shell prompt?（）
