多項(xiàng)選擇題Why do large OSPF networks use a hierarchical design?（）

A.to confine network instability to single areas of the network.
B.to reduce the complexity of router configuration
C.to speed up convergence
D.to lower costs by replacing routers with distribution layer switches
E.to decrease latency by increasing bandwidth
F.to reduce routing overhead


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1.單項(xiàng)選擇題Which parameter or parameters are used to calculate OSPF cost in cisco routers?（）

A.Bandwidth, Delay,and MTU
B.Bandwidth
C.Bandwidth and MTU
D.Bandwidth , MTU,Reliability,Delay,and Load

4.單項(xiàng)選擇題Given an IP address 172.16.28.252 with a subnet mask of 255.255.240.0, what is the correct network addres?（）

A.172.16.16.0
B.172.16.24.0
C.172.16.0.0
D.172.16.28.0

5.單項(xiàng)選擇題You have been asked to come up with a subnet mask that will allow all three web servers to be on the same network while providing the max number of subnets.Which network address and subnet mask meet this requirement?（）

A.192.168.252.8 255.255.255.248
B.192.168.252.8 255.255.255.252
C.192.168.252.16 255.255.255.240
D.192.168.252.0 255.255.255.252
E.192.168.252.16 255.255.255.252