A TV Station Plans to Adopt Huawei OceanStor 9000 as a Back-End

A TV station plans to adopt Huawei OceanStor 9000 as a back-end storage system, with 10 OceanStor 9000 C nodes, planned to be deployed in 4 standard cabinets, with all backends connected to a pair of stacked back-end CE6850 switches. There is no single customer in the existing networking standalone management network. Which of the network IP address planning described below is incorrect?

A) You can plan back-end storage network for 9000 internal communications, without planning gateway address, and front-end network with the same network segment IP address.
B) Oceanstor 9000 front-end network and management network can be considered together, planning for the same network segment.
C) Back-end CE6850 switches need to use four stacked cables for stacking connection to ensure bandwidth requirements
D) The external NTP server address and the OceanStor 9000 front-end network need to communicate to ensure that the OceanStor 9000 system and client applications maintain time synchronization.