单项选择题
A.The Serial0/0 interface is passing traffic.
B.The DLCI 100 was dynamically allocated by the router
C.The Serial0/0 interface acquired the IP address of 172.16.3.1 from a DHCP server
D.The DLCI 100 will be dynamically changed as required to adapt to changes in the Frame Relay cloud
E.The mapping between DLCI 100 and the end station IP address 172.16.3.1 was learned through Inverse ARP
单项选择题 Router A is unable to reach Router B.Both routers are running ios version 12.0.After reviewing the command output and graphic,what is the most likely cause of the problem?（）
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?（）