DCI is critical for industries with high data transfer needs, per HCSA-Sales-Transmission & Access: Finance (A): Requires low-latency, secure interconnects. Large Enterprise (D): Needs scalable data center links. ISP (E): Manages massive traffic between data centers. Government (B) and Education (C): Less focus on DCI; more on campus or access networks. Thus, A, D, and E are correct. Reference: Huawei DCI Target Industries, HCSA-Sales-Transmission & Access training slides.
