【单选题】
“backward mapping”，即回溯图式的政策，也被称为（）的政策。
A、自上而下
B、自下而上
C、理论导向
D、实践导向
查看正确答案
A、Static mapping is used when the remote router does not support Inverse ARP. B、Frame Relay Inverse ARP requires LMI capability to construct an address to the DLCI mapping tableon the router. C、Frame Relay Inverse ARP is disabled by default in Cisco IOS Software for all protocols that areenabled on the physical interface. D、Inverse ARP does not work when LMI is disabled. E、Frame Relay provides forward and backward congestion notification messages
