路由器 S0/0 接口通过帧中继接入网络,在此路由器上看到如下接口信息:
[MSR]display interface Serial 0/0
Serial0/0 current state: UP
Line protocol current state: UP
InternetAddress is 3.3.3.1/24 Primary
Link layer protocol is FR IETF
LMI DLCI is 0, LMI type is Q.933a, frame relay DTE
LMI status enquiry sent 91, LMI status received 69
LMI status timeout 22, LMI message discarded 1
那么可知( )。
A.接口封装的 LMI类型是 Q.933a B.接口使用虚电路号是DLCI 0 C.接口的PVC 状态已经是 UP D.本接口已经发送了 91个状态查询报文来查询接口的PVC状态正确答案AD
