Cisco Certified Network Associate (CCNA) validates the ability to install, configure, operate, and troubleshoot medium-size route and switched networks, including implementation and verification of connections to remote sites in a WAN.
Its official website has CCNA syllabus, CCNA Exams & Recommended Training, CCNA Recertification, Cisco Learning Network, Academy Locator, Certification & Communities Online Support, Discussion Forums, Global Learning Partner Locator etc
Web : http://www.cisco.com/web/learning/le3/le2/le0/le9/learning_certification_type_home.html