The user has sufficient backup client resources, but the production network resources are relatively tight. The planned full backup data volume is between 1-2T once a week, the backup window is 3…

The user has sufficient backup client resources, but the production network resources are relatively tight. The planned full backup data volume is between 1-2T once a week, the backup window is 3 hours, source-side deduplication is used, the deduplication ratio is 3, and the bandwidth utilization is 0.8. Which of the following networking can meet the backup business requirements and require the least investment?