The following level of experience or equivalent knowledge is recommended:
CCDA certifications are valid for three years. To recertify, pass ONE of the following before the certification expiration date:
- Any current 642-XXX professional-level or any 300-XXX professional-level 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.