The Cisco Certified Design Expert (CCDE) certification is a prestigious credential for experienced network architects and designers who possess expert-level knowledge and skills in designing complex network infrastructure. The CCDE certification exam (400-007) assesses candidates on their ability to develop solutions that meet business requirements while considering technical and security constraints. Achieving CCDE certification demonstrates mastery of the network design principles and best practices, and validates the expertise to lead complex design projects for large-scale organizations. The certification is highly valued by employers, and holders of CCDE certification are recognized as leaders in the field of network design.