LoadRunner Professional works with two virtualization tools, to help you test under real-world conditions:
Network Virtualization: Enables you to test point-to-point performance by incorporating real-world network conditions into your load and performance testing processes.
For details, see Network Virtualization.
Service Virtualization: Enables you to run tests with virtual services instead of actual services, so that the business processes in the tested application run as expected.
For details, see Service Virtualization.