www.youtube.com This video provides a careful and detailed explanation of Question 6, “Backup Management,” from Japan’s 2025 FE Examination Section B Public Sample Problems. Among the new Section B topics, backup operations—which span both information security and business continuity—are particularly important. The video breaks down the concepts of backup planning, RPO and RTO, and the ICT continuity requirements aligned with JIS Q 27001:2023 in a clear and accessible manner. The scenario focuses on backup operations for a file server and the requirements related to how far data must be restored and how quickly the system must be brought back into operation after a failure. The file server is configured with an RPO of 72 hours and an RTO of 120 hours. Using the case where a failure occurs at noon on Friday, the video explains what an RPO of 72 hours concretely means by walking through the calendar timeline. It emphasizes that in order to meet the RPO, the organization must be able to restore at least to the state of the system as of noon on Tuesday. The video also explains the differences between full backups and incremental backups, along with their respective restore procedures. Company A performs full backups every Saturday and incremental backups every Tuesday and Thursday. The assumptions given in the problem are that restoring a full backup requires 4 hours and applying each incremental backup requires 0.25 hours. Using the example of a failure occurring at noon on Thursday, the video clarifies which backups need to be applied and in what order. By restoring the full backup and applying the two relevant incremental backups, the total restore time becomes 4.50 hours. This process is traced using a clear time sequence to help viewers understand not only the calculations but also the reasoning behind them. The problem also asks how Company A, which is ISMS-certified, should address new ICT continuity requirements under the updated JIS Q 27001:2023 standard. Within an information security management system, backup planning and recovery procedures are not merely technical tasks—they must be approved, maintained, and regularly tested at the management level. The video explains why roles at the executive level, such as the Chief Information Security Officer (CISO), are responsible for approving ICT continuity plans, and how this aligns with the principles of JIS Q 27001:2023. In this way, Question 6 goes far beyond simple calculation. It integrates concepts from backup management, business continuity, and information security management. The video covers the differences between RPO and RTO, how full and incremental backups work together, how to calculate restore time, and the ICT continuity measures required by the latest JIS Q 27001:2023 standard—all from both exam-preparation and practical perspectives. This content is ideal for examinees who want to strengthen their understanding of the information security domain in Section B, review backup design and business continuity concepts with concrete numerical examples, or grasp the key points of JIS Q 27001:2023. For those preparing for the new FE exam format from 2025 onward, this video will help turn these topics into reliable scoring opportunities.
