VMware has released a new exam to qualify for the VMware Certified Advanced Professional 5 - Data Center Administration (VCAP5-DCA) Certification. This new exam (exam code VDCA550) is based on vSphere v5.5, where the existing exam (exam code VDCA510) is based on vSphere v5.0/5.1. Passing either of these exams will earn VCAP5-DCA certification if you meet the other pre-requisites.
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Recommended Course: VMware vSphere: Optimize and Scale [V5.5]