TCP/IP Header Compression
RFC 1414 describes a mechanism that can improve the efficiency of bandwidth utilization over low-speed serial links, using features such as TCP/IP header compression. A typical TCP/IP packet has a 40-byte datagram header that, once the connection is established, is fairly redundant in following packets. A compressed header is an average of 10 bytes in length because the receiving end can reconstruct the header by receiving a smaller header that identifies the connection and indicates the fields that changed and the amount of change.
However, for this algorithm to function properly, packets must arrive in order. If the packets were to arrive out of order, the reconstruction appears to work, but the packets do not match ...
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