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The Open Transport CSMA/CD driver is a STREAMS driver that presents a DLPI to its clients. It is based on Revision 2.0.0 of the DLPI Specification, and is a Style 1 provider, supporting the connectionless mode primitives. Developers who wish to write CSMA/CD drivers that will interoperate with the Open Transport AppleTalk and TCP/IP implementations should use the information given in this section to guide their implementation.