Regarding the networking of the Huawei Oceanstor 9000 system, which of the following option descriptions...

Whether it is a front-end business network or a back-end storage network, it is recommended to use two switches to connect all nodes to achieve redundancy

Only the storage node needs to be connected to the management network, and other devices do not need to be connected to the management network

The front-end business network switches can be stacked, but the back-end storage network switches are not recommended for stacking

To meet the management requirements, only the first three nodes of the cluster need to be connected to the management network