Cisco’s CCDA (Cisco Certified Design
Associate) is an introductory to mid-level certification for IT
professionals who can “design routed and switched network
infrastructures involving LAN, WAN, and dial access services for
businesses and organizations.” The CCDA has as its prerequisite
the “knowledge and skills to install, configure, and operate
basic network infrastructures.” As well, Cisco highly recommends
holding the CCNA (Cisco Certified Network Associate).