NetFlowFastBitStringHeap Question

Hi, I have searched in Thwack and externally and I want some information on this SQL table.  If I truncate it what impacts will it have?  If truncated will new entries be recreated as DNS resolves?  What settings regulate the data that is entered into this table?  Mine has over 250 million rows.

Row Count - 271,306,067

Size - 16,024.367 MB

Index Space - 16,024.367 MB