Overview
Cisco Certified Design Associate (CCDA) is for network design engineers, technicians, and support engineers, who enable efficient network environments with an understanding of network design fundamentals. A CCDA certified network professional demonstrates the skills required to design basic campus, data center, security, voice, and wireless networks.
Prerequisites
A valid CCENT or a valid CCNA Routing and Switching or any CCIE certification can act as a prerequisite.
View certification details (on official Cisco site).