What is the difference between Selenium Grid and Selenium RC?
Selenium Grid and RC are both ways of running, controlling, and scaling automated tests across a number of different machines. Selenium Grid allows you to control a number of different browsers from one central location, and is a great fit when you need to run tests in multiple browsers on a number of different machines.
Selenium Remote Control, or RC for short, is more for running tests in parallel on the same machine. It’s great when you need to run tests from many different locations and aren’t concerned with managing the browsers themselves.
Read more: https://www.softwaretestingmaterial.com/selenium-introduction/