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  3. Before installing a new, upgraded version of the IOS, what should be checked on the router, and which command should be used to

Before installing a new, upgraded version of the IOS, what should be checked on the router, and which command should be used to

admin2019-04-08  77
问题 Before installing a new, upgraded version of the IOS, what should be checked on the router, and which command should be used to gather this information?
选项 A、        the amount of available ROM
B、        the amount of available flash and RAM memory
C、        the version of the bootstrap software present on the router
D、        show version
E、        show processes
答案B,D
解析 在安装升级一个新的IOS之前，需要了解路由器上的那些参数，且下面那个命令是收集这些参数的信息？
考题分析：IOS是路由器的操作系统，它是储存在Flash中，运行在RAM中的。所以在更新路由器的IOS时，要首先考虑Flash和RAM的大小容量。然后Flash和RAM的容量可以通过show version这个命令查看到，所以答案B、D。
1．flash空间是否充足
2．查看设备的版本对是否支持IOS
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