The requirements of the CCNA certification course are:

• You must possess a valid CCNA or any CCIE certification 

• You have to pass three exams, namely: Implementing Cisco IP Routing (ROUTE), Implementing Cisco IP Switched Networks (SWITCH), and Troubleshooting and Maintaining Cisco IP Networks (TSHOOT). 

The duration of the exams is 2 hours and $200 each.