When you perform the password recovery procedures, you need to first start the router to Rommon mode. Then you need to set the register to 0x2142. You will then save the setting and restart the router.

1. 1.How can you start the router in Rommon mode?
2. 2.what was the original register before you change it?
3. 3.what is the purpose of setting the register to 0x2142?
4. 4.what happens when you restart the router?