The Figure Shows an N8500 (V200R001) NAS Engine Chassis

The figure shows an N8500 (V200R001) NAS engine chassis. The two NAS engine nodes in the chassis form a two-node N8500 NAS cluster. Which description of the front-end and back-end network planning of the cluster is correct. (Multiple choice.)

A) On the slots of the same position on both nodes, such as A3 and B3, you must insert the same type of interface card.
B) A5 and B5, A6 and B6, you can choose a group to do heart network, the key is how to make a network connection.
C) If the back end of the engine cluster is to be directly connected to four control enclosures, add one FC HBA card in slots A2 and B2 for the controller enclosure of direct connection.
D) A2, A3, A4 and B2, B3, B4 can be plugged into a 1Gb iSCSI or 8Gb FC interface module to connect with the business network.