【cisco证书验证失败】Cisco试题:验证主机联通性
【shitiku.jxxyjl.com--思科试题】
问题which command can verify application layer connectivity between 2 hosts?
a. arp
b. ping
c. telnet
d traceroute
e. plp
题目意思：以下命令当中那个是在应用层验证两个主机的联通性的命令？
telnet tests the application layer, ping test the network layer.telnet is an application used to remotely configure a device. if telnet is succesfful you know that full 7 layer stack on the sending and receiving host are configured correctly and are in working order
因为telnet命令是工作在应用层，ping命令是工作在网络层的，telnet是应用于远程控制设备的，所以如果能telnet成功的话，这就证明了两台主机或设备已经联通了，在联通性上面已经没有问题了。
该题目主要考学员命令工作的层面，和osi七层的关系。
正确答案：c
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