On vSphere, the two block storage protocols supported are:
A. SAN (Storage Area Network)
D. iSCSI (Internet Small Computer System Interface)
Block storage protocols such as SAN and iSCSI are used for providing block-level access to storage resources in vSphere environments, enabling features like VMFS (Virtual Machine File System) and allowing direct access to storage blocks.
SMB (Server Message Block) is a file-level protocol rather than a block-level protocol and is not typically used for block storage in vSphere environments.
NFSv4.1 and NFSv3 are network file system protocols used for file-level access rather than block-level access and are not considered block storage protocols in the context of vSphere block storage.
The given answer is correct. B. SMB - Server Message Block and D. iSCSI.
SAN is not a protocol, we can use SAN with protocols such iSCSI, FC, FCoE, etc.
NFS - is file-level storage.
A SAN is block-based storage, leveraging a high-speed architecture that connects servers to their logical disk units (LUNs). A LUN is a range of blocks provisioned from a pool of shared storage and presented to the server as a logical disk.
A. SAN (Storage Area Network) and D. iSCSI (Internet Small Computer System Interface) are two block storage protocols supported on vSphere.
SAN is a high-speed network of storage devices that provides block-level access to data over a fiber channel network. A SAN provides centralized storage for virtual machines and allows for fast, low-latency access to storage resources.
iSCSI is a block-level protocol that enables communication between an iSCSI initiator (such as a vSphere host) and an iSCSI target (such as an iSCSI storage array). iSCSI provides a cost-effective and scalable storage solution for vSphere environments and allows you to use existing Ethernet networks to connect vSphere hosts to storage resources.
B. SMB (Server Message Block) and C. NFSv4.1 (Network File System version 4.1) are file-level protocols, not block-level protocols. They are not supported as block storage protocols on vSphere.
E. NFSv3 (Network File System version 3) is also a file-level protocol, not a block-level protocol, and is not supported as a block storage protocol on vSphere.
VMware fully supports a configuration of WSFC using in-guest iSCSI initiators or in-guest SMB (Server Message Block) protocol, provided that all other configuration meets the documented and supported WSFC configuration. Using this configuration in VMware virtual machines is similar to using it in physical environments.
https://kb.vmware.com/s/article/2147661#:~:text=VMware%20fully%20supports%20a%20configuration%20of%20WSFC%20using,is%20similar%20to%20using%20it%20in%20physical%20environments.
A & D is correct. SMB is not block storage protocol. It is communication protocol, might be considered as storage protocol as well but it is NOT BLOCK storage, it's file based.
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