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发表于 2003-7-11 00:45:12
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还有实际场景题,那是真正考分析能力的,就是我平时很你们说的troubleshooting。你还没有学会如何看问题。<br>看这题:<br><br>25. SPOTO1#show interface <br>serial 0/0 is down, line protocol is down<br>Hardware is HD64570<br>Internet address is 172.22.5.1/30<br>MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load 1/255<br>Encapsulation HDLC, loopback not set, keepalive set (10 sec)<br>Last input never, output 00:03:11, output hang never<br>Last clearing of "show interface" counters never<br>Input queue: 0/75/0 (size/max(drops): Total output drops: 0<br>Queuing strategy: weighted fair<br>Output queue: 0/1000/64/0 (size/max active/threshold/drops)<br>Conversations 0/2/256 (active/max active/max total)<br>Reserved Conversations 0/0 (allocated/max allocated)<br>5 minute input rate 0 bits/sec, 0 packets/sec<br>5 minute output rate 0 bits/sec, 0 packets/sec<br>0 packets input, 0 bytes, 0 no buffer<br>Received 0 broadcasts, 0 runts, 0 giants, 0 throttles<br>0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort<br>11 packets output, 476 bytes, 0 underruns<br>0 output errors, 0 collisions, 27 interface resets<br>0 output buffer failures, 0 output buffers swapped out<br>11 carrier transitions<br>DCD=down DSR=down DTR=down RTS=down CTS=down<br>SPOTO1 cannot establish a connection to SPOTO2 using the show interface serial 0/0 command on SPOTO1 command which layer of the OSI model is most likely the problem?<br>A. Physical layer.<br>B. Data layer.<br>C. Network layer.<br>D. Transport layer.<br><FONT COLOR="FF0000">serial 0/0 is down, line protocol is down</FONT><br>看这里,明显是广域网串口出问题了嘛,当然是物理端口问题。<br><br>这种题目最考能力的。<br> |
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