NVMe over TCP (nicknamed "iNVMe") is the up-and-coming RDMA-free protocol for NVMe over Fabrics. Like iSCSI, NVMe over TCP offers commodity connectivity to storage arrays that get reliable, high performance connectivity via Fibre Channel.
Do you ever run into one of those situations where people are using a term in a context different from the one you think of? Many times I find that happens in a situation where something has been around for so long that "everybody knows" what it is. But what "everybody knows" is different based on their personal history or experience. For me, IP SAN is one of those terms. Networked storage of one form or another; presented by one protocol or another has been part of my professional life since the early 1980s. But times and terms change and it can be confusing to people as to what is meant by the term. So lets see if we can't shed some light on this.