F-SECURE POLICY MANAGER 8.0 Administrator's Manual - page 209
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APPENDIX D
209
NSC Notation for Netmasks
Netmask
Bits
Netmask
Bits
255.255.128.0
17
255.255.255.128
25
255.255.192.0
18
255.255.255.192
26
255.255.224.0
19
255.255.255.224
27
255.255.240.0
20
255.255.255.240
28
255.255.248.0
21
255.255.255.248
29
255.255.252.0
22
255.255.255.252
30
255.255.254.0
23
255.255.255.254
31
255.255.255.0 24
255.255.255.255
32