This paper focuses to reduce the search speed of the packet and the storage capacity in the network detection. The Packet Capture Appliance (PCA) has the storage problems because of the overload of pre-processing and the storage of BigData. We propose a method of storing the First-N packets. So it improves the search speed and the storage capacity efficiency by storing the first n packets of the session. This method shows an efficiency of about 99.319% storage space compared with the full packet capture method.
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