Hello arulsuga
If you want to learn and practice the fundamentals then this would be the best place to start:
HOL-1810-01-SDC - VIRTUALIZATION 101
Module 2 - Introduction to vSphere Networking And Security
http://docs.hol.vmware.com/HOL-2017/hol-1810-01-sdc_pdf_en.pdf
If you wanted something far more specific and advanced the Network virtualization NSX labs would be an option.
Bob