[单选题]路由器上“水平分割”的功能是：()
正确答案 ：B
阻止路由环路
[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 are a systems administrator and you are about to assign static IP addresses to various servers on your network. For the network 192.168.20.24/29 the router is assigned to the first usable host address, while the last usable host address goes to your Sales server. Which one of the following commands would you enter into the IP properties box of the sales server?
正确答案 ：C
IP address: 192.168.20.30 Subnet Mask 255.255.255.248 Default Gateway: 192.168.20.25
解析：解析：ExplanationAsubnetmaskuses29bits.Thismeansthatituses5bitsinthe4thoctet.Thisequatesto255.255.255.248.Thisnetworkhas3bitsforhosts.Usingthe2n-2formula(23-2)inthiscase),weareleftwith6(2*2*2-2=6)hostaddresses.192.168.20.24isthenetworkaddress.Thereforethenextaddress(192.168.20.25)wouldbethefirsthostaddress.Thisaddressmustbeassignedtotherouter,whichservesasthegatewayforthenetwork.Thelastavailablehostaddresswouldbe192.168.20.30(192.168.20.24+6).Thisaddressisassignedtotheserver.Thebroadcastaddressis192.168.20.31.
[单选题]You are a senior network administrator at Ezonexam, and while performing the password recovery procedure on your 2500 series Cisco router, you type in the following command:o/r 0x2142
正确答案 ：C
It is used to bypass the configuration in NVRAM.
解析：解析：Explanation:
[多选题]Regarding the extended ping command; which of the statements below are true?(Select all valid answer choices)
正确答案 ：BDE
The extended ping command is available from privileged EXEC mode.
With the extended ping command you can specify the timeout value.
With the extended ping command you can specify the datagram size.
解析：解析：Explanation:
[单选题]RIP路由协议认为“网络不可到达”的跳数是：()
正确答案 ：B
16
[单选题]对路由器的描述，正确的是（）
正确答案 ：C
多广播域，单冲突域的设备
[单选题]OSI七层模型中，网络层的数据封装名称为（）
正确答案 ：C
包
[单选题]下列对RIP的配置中，合法的命令是（）
正确答案 ：C
router rip network 10.12.0.0
[单选题]A Ezonexam PC has the IP address 172.16.209.10 /22. What is the subnet of this address?
正确答案 ：C
172.16.208.0
解析：解析：Explanation:
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