多項選擇題下列哪些屬于第二層安全配置()

A.啟用端口安全
B.跟橋保護(hù)
C.廣播風(fēng)暴控制
D.Cisco安全端口分析器


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1.單項選擇題Which IPV6 routing protocol uses multicast group FF02::9 to send updates?()

A.RIPng
B.OSPFv3
C.static
D.IS-IS for IPv6

2.多項選擇題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.