問題
Which command can verify Application Layer connectivity between 2 hosts?
A. arp
B. ping
C. telnet
D traceroute
E. plp
題目意思：以下命令當中那個是在應用層驗證兩個主機的聯(lián)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
因為telnet命令是工作在應用層，ping命令是工作在網(wǎng)絡層的，telnet是應用于遠程控制設備的，所以如果能telnet成功的話，這就證明了兩臺主機或設備已經(jīng)聯(lián)通了，在聯(lián)通性上面已經(jīng)沒有問題了。
該題目主要考學員命令工作的層面，和OSI七層的關系。
正確答案：C
Which command can verify Application Layer connectivity between 2 hosts?
A. arp
B. ping
C. telnet
D traceroute
E. plp
題目意思：以下命令當中那個是在應用層驗證兩個主機的聯(lián)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
因為telnet命令是工作在應用層，ping命令是工作在網(wǎng)絡層的，telnet是應用于遠程控制設備的，所以如果能telnet成功的話，這就證明了兩臺主機或設備已經(jīng)聯(lián)通了，在聯(lián)通性上面已經(jīng)沒有問題了。
該題目主要考學員命令工作的層面，和OSI七層的關系。
正確答案：C