Hi Madhu,
Welcome to VMware Communities.
The entry level certification in VMware is the VCA (VMware Certified Associate). You will have to first go through basic topics like what is virtualization, how does it differ from classic DC's etc. Once you have gained a good knowledge of all these basics, you will have to go through a online self-paced training which is free on VMware site.
The exam can be scheduled through PearsonVUE and can be given from your place. You need not go to a testing center like you did for CCNA.
Here's the link for the certification page.
https://mylearn.vmware.com/mgrReg/plan.cfm?plan=41162&ui=www_cert
The related course and it's link is on the same page.
Do let us know if you have any more questions.