Extension practice
Configuration Register Practice Questions
Extension practice: boot behavior controlled by the configuration register.
Author-reviewed by LabFabric · 7 September 2026 · Report a content issue
One solved question, so you can see how these are marked
A router boots with show version reporting a configuration register value of 0x2142. What effect does this have?
The router ignores the contents of NVRAM and boots into setup mode without the saved configuration
Bit 6 of the register (0x2142) tells the router to skip reading the startup-config in NVRAM at boot, which is the classic setting used for password recovery and the cause of a router appearing blank after a reload.
Every question in the set below is marked like this. The answers stay hidden until you pick one.
Find related practice in the CCNA path