2. 计算机
  3. Refer to the exhibit． For what two reasons has the router loaded its IOS image from the location that is shown?

Refer to the exhibit． For what two reasons has the router loaded its IOS image from the location that is shown?

admin2019-04-08  18
问题 Refer to the exhibit． For what two reasons has the router loaded its IOS image from the location that is shown?
选项 A、Router1 has specific boot system commands that instruct it to load IOS from a TFTP server．
B、Router1 is acting as a TFTP server for other routers．
C、Router1 cannot locate a valid IOS image in flash memory．
D、Router1 defaulted to ROMMON mode and loaded the IOS image from a TFTP server．
E、Cisco routers will first attempt to load an image from TFTP for management purposes．
答案A,C
解析 System image file is ?°tftp://172．16．1．129/Hampton/nitro/c7200-j-mz?±这句话表明系统的镜像来自从 tftp。引导程序首先使用flash中所找到的第一个有效的IOS镜像，如果flash中没有有效的IOS镜像，引导程序将生成一个TFTP本地广播以定位TFTP服务器，如果没有找到TFTP服务器，引导程序将加载ROM中的迷你IOS（RXBOOT 模式），如果ROM中有迷你IOS，那么迷你IOS在随后加载并且进入RXBOOT模式；否则路由器不是重新试图寻找IOS镜像，就是加载ROMMON并且进入ROM Monitor模式。因此说明Router 1在flash中没有找到有效的IOS镜像。从而加载了tftp中的镜像。
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