Questions : CCNA Exam

Which of the following configuration registers will cause the IOS to boot from Flash if no boot system commands are present?

A. 0x2100

B. 0x2106

C. 0x2140

D. 0x2101


Answer :
B. If the boot field in the configuration register is 2-F, the router or switch will load the IOS from Flash when no boot system commands are present. Answers A and C will load into ROMmon because the boot field is 0. Answer D has a 1 in the boot field, so it will load to RxBoot.