单选题If XYZ LTD needs to upgrade the Cisco IOS Software of a Cisco Router, Where is the best place to download the upgrade image file from?（）AThe best option is to download it from the Cisco TAC websiteBThe best option is to download it from the Cisco.Com Software support siteCThe best option is to download it form the Cisco Advanced Services websiteDThe best option is to download it from the TFTP site on Cisco.com
单选题
If XYZ LTD needs to upgrade the Cisco IOS Software of a Cisco Router, Where is the best place to download the upgrade image file from?（）
A
The best option is to download it from the Cisco TAC website
B
The best option is to download it from the Cisco.Com Software support site
C
The best option is to download it form the Cisco Advanced Services website
D
The best option is to download it from the TFTP site on Cisco.com
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