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單項(xiàng)選擇題What is one reason that WPA encryption is preferred over WEP（）。

A.A WPA key is longer and requires more special characters than the WEP key.
B.The access point and the client are manually configured with different WPA key values.
C.WPA key values remain the same until the client configuration is changed.
D.The values of WPA keys can change dynamically while the system is used.

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1.單項(xiàng)選擇題Which item represents the standard IP ACL?（）

A.access-list 50 deny 192.168.1.10.0.0.255
B.access-list 110 permitip any any
C.access-list 2500 deny tcp any host 192.168.1.1eq22
D.access-list 101 deny tcp any host 192.168.1.1

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2.單項(xiàng)選擇題An access list has been designed to prevent HTTP traffic from the Accounting Department from reaching the HR server attached to the Holyoke router. Which of the following access lists will accomplish this task when grouped with the e0 interface on the Chicopee router（）。

A. permit ip any any deny tcp 172.16.16.0 0.0.0.255 172.17.17.252 0.0.0.0 eq 80
B. permit ip any any deny tcp 172.17.17.252 0.0.0.0 172.16.16.0 0.0.0.255 eq 80
C. deny tcp 172.17.17.252 0.0.0.0 172.16.16.0 0.0.0.255 eq 80 permit ip any any
D. deny tcp 172.16.16.0 0.0.0.255 172.17.17.252 0.0.0.0 eq 80 permit ip any any

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3.多項(xiàng)選擇題 Which routing protocols can be used within the enterprise network shown in the diagram? （）

A.RIP v1
B.RIP v2
C.IGRP
D.OSPF
E.BGP
F.EIGRP

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4.多項(xiàng)選擇題Which of the following describes the roles of devices in a WAN？（）

A.A CSU/DSU terminates a digital local loop
B.A modem terminates a digital local loop
C.A CSU/DSU terminates an analog local loop
D.A modem terminates an analog local loop
E.A router is commonly considered a DTE device
F.A router is commonly considered a DCE device

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5.多項(xiàng)選擇題At which layers of the OSI model do WANs operate?（）

A.application layer
B.session layer
C.transport layer
D.network layer
E.datalink layer
F.physical layer

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