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判斷題對(duì)于一個(gè)主接口，可以為它提供多個(gè)備份接口，當(dāng)主接口出現(xiàn)故障時(shí)，多個(gè)備份接口可以同時(shí)接替主接口進(jìn)行通訊。

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1.多項(xiàng)選擇題下面能夠表示"禁止從129.9.0.0網(wǎng)段中的主機(jī)建立與202.38.16.0網(wǎng)段內(nèi)的主機(jī)的WWW端口的連接"的訪問控制列表是（）。

A.acl101 rule deny tcp source129.9.0.00.0.255.255 destination 202.38.16.00.0.0.255 destination-port equal www
B.acl101 rule deny tcp source129.9.0.00.0.255.255 destination 202.38.16.00.0.0.255 destination-port equal 80
C.acl100 rule deny udp source129.9.0.00.0.255.255 destination 202.38.16.00.0.0.255 destination-port equal www
D.acl99 rule deny udp source129.9.0.00.0.255.255 destination 202.38.16.00.0.0.255 destination-port equal www

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2.多項(xiàng)選擇題A single 802.11g access point has been configured and installed in the center of a square office. A few wireless users are experiencing slow performance and drops while most users are operating at peak efficiency. What are three likely causes of this problem (Choose three.)（）。

A.mismatched TKIP encryption
B.null SSID
C.cordless phones
D.mismatched SSID
E.metal file cabinets
F.antenna type or direction

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3.單項(xiàng)選擇題Which command is used to see the path taken by packets across an IP network?（）

A.show ip route
B.show route
C.traceroute
D.trace ip route

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4.單項(xiàng)選擇題Which command would you configure globally on a Cisco router that would allow you to view directly connected Cisco devices?（）

A.enable cdp
B.cdp enable
C.cdp run
D.run cdp

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5.單項(xiàng)選擇題Which component of VPN technology ensures that data can be read only by its intended recipient？（）

A.data integrity
B.encryption
C.key exchange
D.authentication

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