单项选择题
A.The router is poisoning the routes and multicasting the new path costs via interface Ethernet1
B.The router is receiving updates about unreachable networks from router that are connected to interface Ethernet1
C.The router is poisoning the routes and broadcasting the new path costs via interface Ethernet1
D.The router is requesting updates for these networks from routers that are connected to interface Etherne1
单项选择题 On corporate network, hosts on the same VLAN can communicate with each other, but they are unable to communicate with hosts on different VLANs. What is needed to allow communication between the VLANs?（）
多项选择题 Which of the following are key characteristics of PPP？（）
单项选择题 There are no boot system commands in arouter configuration in NVRAM.What is the fallback sequence that router will use to find an ios during reload?（）
