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18 Software Developer’s Manual
Architectural Overview
Descriptors store the following information about the buffers:
• The physical address
• The length
• Status and command information about the referenced buffer
Descriptors contain an end-of-packet field that indicates the last buffer for a packet. Descriptors
also contain packet-specific information indicating the type of packet, and specific operations to
perform in the context of transmitting a packet, such as those for VLAN or checksum offload.
Section 3 provides detailed information about descriptor structure and operation in the context of
packet transmission and reception.