---
title: "Header block"
---
packet-beta
0-3: "order"
4-7: "reserved = 0"
8-15: "type (2)"
16-31: "version (2)"
32-63: "magic number (INSP)"
64-95: "generation count"
96-127: "generation count (cont.)"
128-159: "size in bytes"
160-191: "unused"
192-255: "unused (cont.)"