...
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16
24
class a :
0
class b
10
class c
1
10
net id host id
net id
host id
net id
host id
1
32
8
octet 1
octet 4
octet 3octet 2
8
16
24
32
1 1 1 0
Class d
8
16
24
32
1 1 1 1 0
class e
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