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6 F 3 B 0 3 6 2
Preamble (7 bytes)
Signal used to synchronize reception
SFD (Start Frame Delimiter) (1 byte)
Remote port address (6 bytes)
Local port address (6 bytes)
Ethernet type (2 bytes)
0800H:IP, 0806H:ARP
IP header (20 bytes)
UDP header
(8 bytes)
TCP header
(20 bytes)
UDP data field
(up to 1472 bytes)
TCP data field
(up to 1460 bytes)
FCS (Frame Check Sequence) (4 bytes)
32-bit CRC code for the sections of the packet
other than the preamble, the SFD, and the FCS.
(Packet error detection)
Figure 7.1 Packet Format/IP Datagram
Packets
traveling on the
transmission
path
(72 to 1526
bytes)
IP data field
(up to 1480
bytes)
IP datagram
(46 to 1500
bytes)
Data fields in
the packets
traveling on the
transmission
path
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