Refer to the exhibit. For what two reasons has the router loaded its IOS image from the location that is shown? (Choose two.)
A.
Router1 has specific boot system command that instruct it to load IOS from 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 a image from TFTP for management purposes.
The loading sequence of CISCO IOS is as follows:
Booting up the router and locating the Cisco IOS
1.POST (power on self test)
2.Bootstrap code executed
3.Check Configuration Register value (NVRAM) which can be modified using the config-register command
0= ROM Monitor mode
1= ROM IOS
2-15 = staitup-config in NVRAM
4.Startup-config file: Check for boot system commands (NVRAM)
If boot system commands in startup-config
Run boot system commands in order they appear in staitup-config to locate the IOS
[if boot system commands fail, use default fallback sequence to locate the IOS (Flash. TFTP, ROM)?]
If no boot system commands in staitup-config use the default fallback sequence in locating the IOS:
a. Flash (sequential)
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can you please explane it better?
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