SAN vs NAS vs ISCSI vs FC vs NFS vs CIFS

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I'm new to the forum and also new to storage. I'm looking to see if you experts can clear some things up for me as google has provided a lot of details but none that seem useful.

My understanding is that iSCSI and FC/FCoE are block protocols and is used in a SAN, and that a SAN is essentially the network where the storage arrays connects with the switches. Am I correct here?

Also, my understanding is that a NAS is a network attached storage appliance, but NAS is also a protocol consisting of NFS and CiFS, so its not an appliance but rather a protocol?

Could someone explain this to me or better yet, explain pretty much SAN/NAS and then how iSCSI/FC/NFS/CFS plays a role. I'm so confused.

Thank you so much in advance. I know this is my first post but I don't know what else to read as they all don't paint a clear picture.

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