You just purchased a Cisco router from an online auction and now you have configured the router and
everything is working perfectly in your test lab. You then issue the command copy run start to save your
configuration to NVRAM. You turn off the power and mount the router in the production rack. After
connecting the power cord you power up the router and the router boots into setup mode. You issue the
show startup-config from privileged mode and your entire configuration is there. Which of the following
indicates a possible source of the problem?

A. Hardware failure NVRAM prevents the router from loading the configuration.
B. Startup-config in flash is corrupt and cannot be analyzed.
C. Router configuration register set to bypass startup configuration.
D. Startup-config in NVRAM is corrupt and cannot be analyzed.
Answer: C
Explanation: We must bypass the startup configuration and boot from ROM. This will enable use to select a
new user name and password which will enable us to access the router. Basically we perform a password
recovery procedure.

有那位大哥可以给我讲一讲看书的时候好像没有看到过这种题目看不懂！谢谢！

這是執行了password recovery的步驟. 由於將config-register的值改變了, 所以router reboot時就不會觀察 nvram 的內容而直接boot from rom.

谢谢！

怎么会出现passwork recover这种情况？他不是保存好了吗？

有時候管理員忘記了密碼, 就需要用上這種步驟來登入router, 然後改變密碼!

哦ok了
谢谢！

顶