The test technique that should be used to define the required test cases for testing this new web site in its various environments is pairwise testing. Pairwise testing is a technique that tests all possible pairs of inputs for a given scenario using a mathematical algorithm to reduce the number of combinations. This technique is suitable for testing a system that has many input variables with different values or options, such as browsers, plug-ins, servers, and operating systems. Verified References: [ISTQB® Certified Tester Advanced Level Test Analyst CTAL-TA], Section 3.5.2, page 42.