Exam 300-610 topic 1 question 102 discussion

There's no pinning in FC switch mode.

Switch mode is the traditional Ethernet switching mode. The fabric interconnect runs STP to avoid loops, and broadcast and multicast packets are handled in the traditional way. Switch mode is not the default Ethernet switching mode, and should be used only if the fabric interconnect is directly connected to a router, or if either of the following are used upstream: Layer 3 aggregation VLAN in a box Note For both Ethernet switching modes, even when vNICs are hard pinned to uplink ports, all server-to-server unicast traffic in the server array is sent only through the fabric interconnect and is never sent through uplink ports. Server-to-server multicast and broadcast traffic is sent through all uplink ports in the same VLAN. in end-host mode the server-to-server traffic stays inside FI. so i would say the answer is B.

I think it should be B Switch mode: A. End Host Mode: In End Host mode, the Cisco UCS Fabric Interconnect acts as a gateway to the SAN, but it doesn't preserve domain IDs in the fabric. This mode is typically used to simplify fabric management and reduce traffic overhead by connecting only directly to the upstream device, not allowing traditional Fibre Channel domain management.

End-host mode is synonymous with NPV mode. This is the default Fibre Channel Switching mode. "https://www.cisco.com/c/en/us/td/docs/unified_computing/ucs/sw/gui/config/guide/141/UCSM_GUI_Configuration_Guide_1_4_1_chapter4.html#concept_495162A236314097A8F78B339C697C60"