單項選擇題The router address 192.168.1.250 is the default gateway for both the Web Server 2 and Host 1.  What is the correct subnet mask for this network?（）

A.255.255.255.0
B.255.255.255.192
C.255.255.255.250
D.255.255.255.252


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1.單項選擇題What must be configured on the network in order for users on the Internet to view web pages  located on Web Server 2?（）

A.On router R2， configure a default static route to the 192.168.1.0 network.
B.On router R2， configure DNS to resolve the URL assigned to Web Server 2 to the  192.168.1.10 address.
C.On router R1， configure NAT to translate an address on the 209.165.100.0/24 network to  192.168.1.10.
D.On router R1， configure DHCP to assign a registered IP address on the 209.165.100.0/24  network to Web Server 2.

3.單項選擇題Users on the 192.168.1.0/24 network must access files located on the Server 1. What route could be configured on router R1 for file requests to reach the server?（）

A.ip route 0.0.0.0 0.0.0.0 s0/0/0
B.ip route 0.0.0.0 0.0.0.0 209.165.200.226
C.ip route 209.165.200.0 255.255.255.0 192.168.1.250
D.ip route 192.168.1.0 255.255.255.0 209.165.100.250

4.單項選擇題Which wireless LAN design ensures that a mobile wireless client will not lose connectivity when moving from one access point to another?（）

A.using adapters and access points manufactured by the same company
B.overlapping the wireless cell coverage by at least 10%
C.configuring all access points to use the same channel
D.utilizing MAC address filtering to allow the client MAC address to authenticate with the surrounding APs

5.單項選擇題Which encryption type does WPA2 use?（）

A.AES-CCMP
B.PPK via IV
C.PSK
D.TKIP/MIC

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