What are the correct items in the following description of lossless network architecture design in...

In the case of a two-level network, the Spine switch does not have an uplink interface, and all ports are used to connect to the Leaf switch

When designing a network architecture, a bottom-up approach is generally used to determine how many layers of architecture to use based on the size of the network

In two-tier networking, the number of Spine switches is equal to the total number of upstream interfaces of all leaf switches divided by the number of interfaces per Spine switch and rounded up by D

First, the total number of network access interfaces is determined according to the number of computing nodes in the cluster and the number of service interfaces of each node