The following level of experience or equivalent knowledge is recommended:
CCDA certifications are valid for three years. To recertify you must pass one of the following before your certification expiration date:
- Any current associate-level exam except for ICND1 exam.
- Any current 642-XXX professional-level or any 300-XXX professional-level exam.
- Any current 642-XXX Cisco Specialist exam.
- Any current CCIE written exam.
- The current CCDE written exam or current CCDE practical exam.
- The Cisco Certified Architect (CCAr) interview and the CCAr board review.
Visit Cisco's site for additional recertification information.