单项选择题
A. show startup-config and 0x2142
B. show version and 0x2102
C. show flash and 0x2102
D. show version and 0x2142
E. show running-config and 0x2142
F. show flash and 0x2142
多项选择题 What should be done prior to backing up an IOS image to a TFTP server?（）
单项选择题 A Cisco router has been configured, and the copy running-config startup-config command has been issued. When the router is power cycled, the router prompts with: "Would you like to enter the initial configuration dialog? [yes/no]" Why has this occurred?（）
单项选择题 Which command will reinitialize the router and totally replace the running configuration with the current startup configuration?（）