The CISSP (Certified Information Systems Security Professional) certification, offered by (ISC)², validates expertise in cybersecurity. A CISSP refresher course serves as a condensed review, covering updated industry practices, current threats, and the latest advancements in the eight domains of the CISSP Common Body of Knowledge (CBK). These refresher sessions typically focus on domain-specific revisions, practice assessments, and interactive learning, aiding certified professionals in staying updated and maintaining their proficiency in cybersecurity principles.