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多項選擇題 所顯示的輸出在一個交換機(jī)被產(chǎn)生。哪三種表述是正確的？（）

A.所有端口都將在丟棄，學(xué)習(xí)，或轉(zhuǎn)發(fā)的狀態(tài)
B.Thiry VLAN是否該交換機(jī)上的配置
C.網(wǎng)橋優(yōu)先級比生成樹的默認(rèn)值
D.所顯示的所有接口都在共享媒體
E.所有指定端口都處于轉(zhuǎn)發(fā)狀態(tài)
F.開關(guān)必須是該交換機(jī)上的所有VLAN的根橋

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1.多項選擇題哪個兩個命令正確驗證是否端口快速以太網(wǎng)0/12端口安全性已配置的交換機(jī)？（）

A. SW1#show swithport port-security interface FastEthernet 0/12
B. SW1# show swithport port-secure interface FastEthernet 0/12
C. SW1# show port-secure interface FastEthernet 0/12
D. SW1#show running-config
E. SW1#show port-security interface FastEthernet 0/12

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2.多項選擇題哪個可以做，以確保虛擬終端接口的路由器上？（）

A.手動關(guān)閉的接口。
B.物理安全的接口。
C.配置虛擬終端的密碼和登錄過程。
D.輸入一個訪問列表，并將其應(yīng)用到使用access-class命令終端接口。
E.創(chuàng)建一個訪問列表，并將其應(yīng)用到使用access-group命令終端接口。

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3.多項選擇題 Refer to the exhibit.The network shown in the exhibit is running the RIPv2 routing protocol.The network has converged，and the routers in this network are functioning properly .The FastEthernet0/0 interface on R1 goes down.In which two ways will the routers in this network respond to this change？（）

A.R1 will send LSAs to R2 and R3 informing them of this change， and then all routers will send periodic updates at an increased rate until the network again converges.
B.Because of the split-horizon rule， router R2 will be prevented from sending erroneous information to R1 about connectivity to the 192.168.1.0 network.
C.When router R2 learns from R1 that the link to the 192.168.1.0 network has been lost， R2 will respond by sending a route back to R1 with an infinite metric to the network.
D.Routers R2 and R3 mark the route as inaccessible and will not accept any further routing updates from R1 until their hold-down timers expire.
E.All routers will reference their topology database to determine if any backup routes to the 192.168.1.0 network are known.

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4.多項選擇題網(wǎng)絡(luò)管理員是Cisco路由器上配置訪問控制列表，允許來自只的網(wǎng)絡(luò)192.168.146.0，192.168.147.0，192.168.148.0和192.168.149.0主機(jī)。哪個結(jié)合是最好的完成任務(wù)，當(dāng)兩個ACL語句？（）

A. access-list 10 permit ip 192.168.147.0 0.0.0.255.255
B. access-list 10 permit ip 192.168.149.0 0.0.0.255.255
C. access-list 10 permit ip 192.168.146.0 0.0.0.0.255
D. access-list 10 permit ip 192.168.146.0 0.0.0.1.255
E. access-list 10 permit ip 192.168.148.0 0.0.0.1.255
F. access-list 10 permit ip 192.168.146.0 255.255.255.0

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5.單項選擇題哪個選項代表了標(biāo)準(zhǔn)的IP ACL？（）

A. access-list 50 deny 192.168.1.1 0.0.0.255
B. access-list 110 permit ip any any
C. access-list 2500 deny tcp any host 192.168.1.1 eq 22
D. access-list 101 deny tcp any host 192.168.1.1

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