640-863 is the new version CCDA exam, and it can be taken in Pearson VUE or Prometric testing center.
I will list out the exam topic for 640-863 exam, you can also find it on the Cisco‘ 640-863 exam page
http://www.cisco.com/web/learning/le3/current_exams/640-863.html
The following information provides general guidelines for the content likely to be included on the Designing Cisco […]

640-861 is the old version for CCDA certification, and 640-861 will retire on 7/13/07. From my experience, I can promise 640-861 will not change quesiton pool before it retire. so now it is a good chance to pass 640-861 and get CCDA certification.
And let me clarify one important thing, whether you pass 640-861 or 640-863, […]

CCNA will not change in March. It is 100%