Help Resetting Router 1721

[Kargodinho91]

I am trying to build a lab at home to study for the CCNA Routing and Switching. I bought a used router (1721) and it has a password already configured in its IOS. Because I purchased this product used, I do not know what the password is. Can anyone help me reset this device to default out of the box configurations or show me a way to re-configure the password so that I can access it? 

Thank you.

[Dennis Mink]

check this link, that explains how to do a password recovery

http://www.vology.com/cisco-1700-password-recovery-1710-1711-1720-1721-1750-1751-1760

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