What is CCNA ?

CCNA stands for Cisco Certified Network Associate. Cisco Systems is a worldwide company known for developing networking and IT software and services. They’re probably most known for their online networking exams which allow people to become certified network engineers. Learn More https://www.theccm.co.uk/courses-page/ccna-200-125-programme/

http://www.nicovideo.jp/watch/sm37575373