ocr: SNAENCAPSULATION: OVERHEAD COMPARISON RFC1490 SNA data unit Frame feacer, variable reiay length As - - : EP TCP Source-route SNA data unit beader neader bridging variable. length header Figure I. This comparison of the two primary SNA encapsulation methods shows differences IR the siructure of packet headers. In each case, the SNA data unit is ofvariable length.
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