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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 router swith distribution layer switches
E.to decrease latency by increasing bandwidth
F.to reduce routing overhead

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1.多項(xiàng)選擇題 根據(jù)下圖，WLANdiagram決定了哪兩個(gè)事實(shí)？（）

A.兩個(gè)cells的overlap的區(qū)域描述了一個(gè)basic service set
B.網(wǎng)絡(luò)描述了一個(gè)extended service set
C.再每個(gè)CELL中的AP必須被配置成使用channel 1
D.為了確保連通性，重疊區(qū)域必須小于10%
E.兩個(gè)訪問(wèn)點(diǎn)應(yīng)該被配置成工作在不同的頻道

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2.單項(xiàng)選擇題Which statement is true，as relates to classful or classless routing？（）

A.RIPV1 and OSPF are classless routing protocols.
B.Classful routing protocols send the subnet mask in routing updates.
C.Automatic summarization at classful boundaries can cause problems on disc……
D.EIGRP and OSPF are classful routing protocols and summarize routes by def……

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3.單項(xiàng)選擇題 根據(jù)下圖，圖中的拓?fù)渲写嬖诙嗌賯€(gè)廣播域？（）

A.1
B.2
C.3
D.4
E.5
F.6

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4.單項(xiàng)選擇題What value is primarily used to determine which port becomes the root port on each nonroot switch in a spanning-tree topology？（）

A.lowest port MAC address
B.port priority number and MAC address
C.VTP revision number
D.highest port priority number
E.path cost

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5.單項(xiàng)選擇題In which solution is a router ACL used？（）

A.protecting a server frome unauthorized acces
B.controlling path selection，based on the route metric
C.reducing router CPU utilization
D.filterring packets that are passing through a router

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