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how ccna certificate look like.rwsender: monitors the incoming directory of the file, moves the file to the processing directory, and delivers it to one or more rwreceiver processes.rwreceiver: receives and processes files transferred from one or more rwsender processes, and stores those files in the destination directory.rwpollexec: monitors the directories of incoming files and runs user-specified commands against each file.rwpackchecker: Reads SiLK stream records and checks for unusual patterns that indicate corrupted data files.packlogic-twoway and packlogic-generic: plug-ins used by rwflowpack when categorizing stream records.SiLKNetFlow records can be read, manipulated, and written in Python using the Python extension for SiLK (PySiLK). PySiLK can be deployed as a standalone Python program, or you can use PySiLK to write plugins for multiple SiLK applications. PySiLK can be used with the SiLK Python plugin (silkpython.so) to define new partitioning rules for rwfilter, new key fields for nvcut, rwgroup, and rwsort, and to define fields in rwstats and rwuniq.3. counting, grouping, and pairing NetFlow records with SiLK The following shows the tools included in SiLK for counting, grouping, and pairing NetFlow records.rwcount : Used to count and summarize the network flow records for the entire time period (named time slots [timebins]). The output includes the number of bytes, the number of packets, and the flow records for each time slot.rwuniq :user-specified key unique record attributes o prints the total number of bytes, packets, and/or stream counts for each time period. rwuniq can also count the number of individual values in a field.rwstats: can go through and summarize NetFlow records like rwuniq, but will first sort the results by value field to generate a Top-N or Bottom-N list, which will then be printed.