The internal table used to track TopN statistics is finite in size. On the condition when the internal table is full and a new IP address is encountered, an element already existing in the table must be removed. This variable determines the manner of selection. Writing byTime(1) will cause the entry with the least recent frame to be discarded. That is, all other entries in the table will have transmitted or received at least one packet more recently. Writing byFrames(2) will select the entry with the fewest transmitted or received frames. Writing byOctets(3) will select the entry with the fewest transmitted or received octets. The default is byTime(1).