Refer to the exhibit a network administrator cannot establish a telnet session with the indicated router at is the cause of this failure?()<img src="https://img.ppkao.com/2018-07/zhanglijun/20180724092953904.jpg" /><p> Refer to the exhibit a network administrator cannot establish a telnet session with the indicated router at is the cause of this failure?()<img src="https://img.ppkao.com/2018-07/zhanglijun/20180724092953904.jpg" /></p>
A、A .A level 5 password is not set
B、B.The vty password is missing
C、C.The console password is missing
D、D.An ACL is blocking Telnet access