The networks added to the metric. The networks added are
presented in bitmap format.
in receiving order:
OCTET 1 OCTET 2 .....
xxxxxxxx xxxxxxxx .....
|| || |_ network 9
|| ||
|| ||___ network 8
|| |____ network 7
|| . . .
||_________ network 2
|__________ network 1
where x : 1 - The represented network added to the metric
0 - The represented network added to the metric