单项选择题
A.Logical units are used only when a Layer 2 identifier is present such as a VLAN
B.A logical unit of 0 is required when using a frame-relay DLCI
C.A logical unit is always required
D.Logical units are not required unless ATM or 802.1Q VLAN tagging is configured.
单项选择题 Which command configures an address of 192.168.1.1 with a mask of 255.255.255.0 on interface ge-0/0/0?（）
单项选择题 Which protocol family is required prior to assigning an IP address to an interface?（）
单项选择题 Which command will save the current active configuration as the rescue configuration?（）