My current CCNA cert expires June 12th of this year. Last Friday I took and passed the Cisco Advanced Wireless LAN for Field Engineers exam 642-587. It's my understanding that by passing this 642-level exam, it recertifies my CCNA for another 3 years. My concern is that the Advanced Wireless LAN for Field Engineers Specialist cert has a second test. Do I have to pass both of the exams to recert my CCNA, or am I good to go?