Exam 350-601 topic 1 question 149 discussion

2 is correct! https://www.cisco.com/c/en/us/td/docs/hyperconverged_systems/HyperFlex_HX_DataPlatformSoftware/Edge_Deployment_Guide/5-0/b-hx-edge-deployment-guide-5-0/m-2-node-preinstall-chklist.html#id_102126 "Dual switch configuration provides a slightly more complex topology with full redundancy that protects against: switch failure, link failure, and port failure. It requires two switches that may be standalone or stacked, and two 10/25GE ports, one 1GE port for CIMC management, and one Cisco VIC 1457 per server. Trunk ports are the only supported network port configuration. Single switch configuration provides a simple topology requiring only a single switch, and two 10/25GE ports, one 1GE port for CIMC management, and one Cisco VIC 1457 per server. Switch level redundancy is not provided, however all links/ports and associated network services are fully redundant and can tolerate failures." B is the one

This might be the reference: "Dual switch cabling provides a slightly more complex topology with full redundancy that protects against: switch failure, link failure, switch port failure, and LOM/PCIe NIC HW failures. It requires two switches that may be standalone or stacked, and four 1GE ports for cluster and VM traffic, one 1GE port for CIMC management, and one Intel i350 PCIe NIC per server. Trunk ports are the only supported network port configuration." https://www.cisco.com/c/en/us/td/docs/hyperconverged_systems/HyperFlex_HX_DataPlatformSoftware/Edge_Deployment_Guide/b-hx-edge-preinstall-checklist/m-3-and-4-node-preinstall-chklist.html