LYCOS RETRIEVER 
Ethernet: Frames
built 631 days ago
Ethernet uses a CyclicRedundancyCheck (CRC) algorithm to detect transmission errors. The FrameCheckSequence field is filled (using a CRC) by the sending host. If the receiving host detects a wrong CRC, it will throw away that packet.
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In addition, Ethernet frames may optionally contain a IEEE 802.1Q tag to identify what VLAN it belongs to and its IEEE 802.1p priority (quality of service). This doubles the potential number of frame types. and increases the frame size to 1522 bytes.
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"Chelsio's 10Gb Ethernet adapters with TOE performed exceedingly well for existing socket applications in our test environment," said Helen Chen, Distinguished Member of the Technical Staff in the Scalable and High Performance Computing Department at Sandia National Laboratories. "TCP offload delivers outstanding performance for iSCSI-based block-level I/O clusters using standard 1500-byte frames."
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The table below shows the complete Ethernet frame, as transmitted. Note that the bit patterns in the preamble and start of frame delimiter are written as bit strings, with the first bit transmitted on the left (not as byte values, which in Ethernet are transmitted least significant bit first). This notation matches the one used in the IEEE 802.3 standard.
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