Enterprise environments require networks designed for performance, availability, and scalability with the flexibility to meet rapidly evolving demands. To meet these challenges head on, skilled IT professionals are needed with up-to-date, fundamental network design skills. For network design engineers, system engineers, and sales engineers and individuals looking to build and validate Cisco network design fundamental knowledge the Cisco CCDA certification program focuses on design methodologies and objectives, addressing and routing protocols, and network expansion considerations within basic campus, data center, security, voice, and wireless networks.