单项选择题
A.incorrect bandwidth configuration
B.incorrect LMI configuration
C.incorrect map statement
D.incorrect IP address
单项选择题 Which encapsulation type is a Frame Relay encapsulation type that is supported by Cisco routers?（）
单项选择题 Which layer 2 protocol encapsulation type supports synchronous and asynchronous circuis and has built-in security mechanisms?（）
多项选择题 Which two options are valid WAN connectivity methods?（）
