The Internet Engineering Task Force (IETF) is responsible for the iSCSI protocol. (See RFC 3720, at http://tools.ietf.org/html/rfc3720.)
Internet Small Computer System Interface (iSCSI) is an Internet Protocol (IP)–based storage standard that connects iSCSI initiators to iSCSI targets over IP networks. To put it simply, the SCSI packets are encapsulated in IP packets and sent over a standard IP network, where the initiators and targets reassemble the packets and interpret the commands carried by these packets.
iSCSI takes advantage of existing IP infrastructure, unlike Fibre Channel (FC), which requires special cables and switches.
The main elements of iSCSI connectivity ...