[单选题]某网络中，拟设计10子网，每个子网中放有14台设备，用IP地址段为199.41.10.X，请问符合此种规划的子网掩码是()
正确答案 ：C
255.255.255.240
[单选题]You have a class C network, and you need to design it for 5 usable subnets with each subnet handling a minimum of 18 hosts each. Which of the following network masks should you use?
正确答案 ：D
255.255.255.224
解析：解析：Explanation:ThedefaultsubnetmaskforclassCnetworkis255.255.255.0.Ifonehastocreate5subnets,then3bitsarerequired.With3bitswecancreate8subnets.Theremaining5bitsareusedforHosts.Onecancreate30hostsusing5bitsinhostfield.Thismatcheswiththerequirement.IncorrectAnswers:A,B:ThisisanillegalsubnetmaskforaclassCnetwork,asthethirdoctetcannotbedividedwhenusingaclassCnetwork.C:ThisisthedefaultsubnetmaskforaclassCnetwork.Itprovidesforonenetwork,with254usablehostIPaddresses.E:Thissubnetmaskwillprovidefor14separatenetworkswith14hostseach.Thisdoesnotmeettherequirementofaminimumof18hosts.
[单选题]如果把路由器的某个端口的IP配置为：192.168.10.64，掩码配置为：255.255.255.248，则该端口（）
正确答案 ：B
会变成“administratively down”状态
[单选题]A new Ezonexam switch is installed into an existing LAN and a new VTP trunk is set up with an existing switch. Which VLANs will be allowed on this new trunk?
正确答案 ：A
All defined VLANs are allowed on the trunk by default.
解析：解析：Explanation:
[多选题]属于私有IP段的是()
正确答案 ：ABD
10.0.0.0-10.255.255.255
172.16.0.0-172.31.255.255
192.168.0.0-192.168.255.255
解析：ABD
[单选题]为了连接“帧中继”线路，网络中的路由器需要提供的端口类型为（）
正确答案 ：B
Serial
[单选题]网关的功能（）
正确答案 ：B
不同网段通信
[多选题]Which of the following steps are necessary in order to add a new VLAN to the Ezonexam switched network? (Select all that apply)
正确答案 ：ABD
Create the VLAN.
Name the VLAN.
Add the desired ports to the new VLAN.
解析：解析：Explanation:
[单选题]为了查看路由器的E0端口上，是否挂接了访问权限表，应该使用的命令是（）
正确答案 ：B
show interface e0
[多选题]You are bringing up a new Ezonexam switch, and wish to connect it via a trunk to another switch from a different vendor, which uses the IEEE standard for the trunking method. When setting the encapsulation type on the trunk, what should you configure on the Cisco switch?
正确答案 ：ABCDE
Switch(config) switchport trunk encapsulation isl
Switch(config) switchport trunk encapsulation ietf
Switch(config-if) switchport trunk encapsulation isl
Switch(config-if) switchport trunk encapsulation ietf
Switch(config-if) switchport trunk encapsulation dot1q
解析：解析：Explanation:
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