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B–Data Center Bridging Technology
Data Center Bridging (DCB)
iSCSI
The Internet Small Computer Systems Interface (iSCSI) is a SCSI mass storage
transport that operates between the Transport Control Protocol (TCP) and the
SCSI Protocol Layers. The iSCSI protocol is defined in RFC 3720 [iSCSI], which
was finalized by the Internet Engineering Task Force (IETF) in April, 2004. A
TCP/IP connection ties the iSCSI initiator and target session components
together. Network portals identified by their IP address and TCP port numbers
define the endpoints of a connection. iSCSI is by nature, a lossless storage
network because inherent in iSCSI's design is recovery from dropped packets on
over-subscribed, heavy network traffic patterns. iSCSI relies on TCP/IP (or SCTP)
for the retransmission of dropped Ethernet frames.
B-4
51031-00 A
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