单项选择题
A. It is used with the OSPF priority values to determine which OSPF router will become the DR or BOR in a point-to-point network
B. It is used with the OSPF priority values to determine which interface will be used to form a neighbor relationship with another OSPF router
C. It is used with the OSPF priority values to determine which router will become the DR or BOR in a multi access network
D. It is used to determine which interfaces will send Hello packets to neighboring OSPF routers
单项选择题 A network administrator needs to verify that switch interface 0/5 has been assigned to the Sales VLA.N. Which command will accomplish this task?（）
单项选择题 How can an administrator determine if a router has been configured when it is first powered up?（）
单项选择题 When is a switched network that is running the Spanning Tree Protocol considered to be fully converged?（）