Explanation A screened subnet is a network segment that is isolated from both the internal and external networks by firewalls or routers. It is used to host publicly accessible servers that need some protection from external attacks, but also need to be separated from the internal network for security reasons. References 1: Seven-Second Subnetting - N10-008 CompTIA Network+ : 1.4 2: CompTIA Network+ Study Guide: Exam N10-008, 5th Edition, page 56 3: CompTIA Network+ N10-008 Exam Subnetting Quiz, question 22