Update plugins_ioam.md

starrysec · Jul 3, 2020 · 2958a9b · 2958a9b
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 ## iOAM
 
+In-band OAM (iOAM) is an implementation study to record operational information in the packet while the packet traverses a path between two points in the network.
+
 ### ipfixcollector
 
 **处理过程**