The default Google Analytics Tracking Code is designed to collect data for a single domain. However, if you use this code in multiple domains then analytics will count the visitors and sessions separately.
You can use one tracking code to collect users and session data in different domains with the Cross-Domain Tracking feature.
This question is a part of the Assessment 1 section of the Advanced Google Analytics Certification course. You can find the answers with full explanation for the first Assessment in our Advanced Google Analytics Assessment 1 Answers page or you can check out the answers for all the assessment questions in our Advanced Google Analytics Assessment Answers page.