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單項選擇題A network administrator receives an error message while tring to configure the Ethernet interface of a router with IP address 10.24.24.24/29.which statement explains the reason for this issue?（）

A.The address is a broadcast address
B.The Ehernet interface is faulty
C.VLSM-capable routing protocols must be enable first on the router.
D.This address is a network address.

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1.單項選擇題 Th efollowing access list below was applied outbound on the E0 interface connected to the 192.169.1.8/29LAN：
access-list 135 deny tcp 192.169.1.80.0.0.7 eq 20 any
access-list 135 deny tcp 192.169.1.80.0.0.7 e q21 any
How will the above access lists affect traffic？（）

A.FTP traffic from 192.169.1.22 wil lbe denied
B.Not raffic，except for FTP traffic wil lbe allowed to exit E0
C.FTP traffic from 192.169.1.9 to any host will be denied
D.All traffic exiting E0 will be denied
E.All FTP traffic to network 192.169.1.9/29 will be denied

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2.單項選擇題一位網(wǎng)絡(luò)管理員在進(jìn)行鏈路連通性檢查時，發(fā)現(xiàn)CiscoCatalyst系列交換機上的LED燈，在綠色和琥珀色之間不停變化。以上現(xiàn)象是因為（）。

A.這個端口存在問題
B.這個端口被管理性的禁止。
C.這個端口被生成樹協(xié)議阻塞
D.這個端口的活動鏈路上有流量。

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3.單項選擇題在OSPF點到點鏈路中，Hello包是發(fā)往以下那個地址？（）

A.127.0.0.1
B.172.16.0.1
C.192.168.0.5
D.223.0.0.1
E.224.0.0.5
F.254.255.255.255

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4.單項選擇題 根據(jù)下圖，假設(shè)路由器已經(jīng)配置了默認(rèn)配置，那么這個接口是（）。

A.Ethernet
B.Fast Ethernet
C.Gigabit Ethernet
D.asynchronous serial
E.synchronous serial

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5.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

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