iSCSIiSCSI Packet
Sourced Port
Destination Port
Sequence Number
Acknowledgment Number
Window
Checksum
Offset
Reserved
Options and padding
Urgent Pointer
Destination
Address
Source
Address
Type
IP
TCP
Data
46 – 1500 bytes
8
6
6
2
FCS
4 Octet
Preamble
TCP Header
iSCSI
encapsulated
Opcode
Opcode Specific Fields
Length of Data (after 40Byte header)
LUN or Opcode-specific fields
Initiator Task Tag
Opcode Specific Fields
Data Field …
Well-known Ports:
21 FTP
23 Telnet
25 SMTP
80 http
5003 iSCSI
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