F-SECURE POLICY MANAGER 9.0, Руководство администратора

Страница: 100 / 102

NSC notation details
NSC notation is a standard shorthand notation, which combines a network address with its associated netmask.
NSC notation defines the number of contiguous one-bits in the netmask with a slash and a number following
the network address. Here is a simple example:
NSC notation Netmask Network address
192.168.0.0/16 255.255.0.0 192.168.0.0
192.168.1.0/24 255.255.255.0 192.168.1.0
192.168.1.255/32 255.255.255.255 192.168.1.255
NSC notation is not compatible with networks that use "comb" style netmasks, where all one-bits are not
contiguous. The following table gives the number of bits for each permitted netmask.
The .0.0.0/0 is a special network definition reserved for the default route.
Bits Netmask
1 128.0.0.0
2 192.0.0.0
3 224.0.0.0
4 240.0.0.0
5 248.0.0.0
6 252.0.0.0
7 254.0.0.0
8 255.0.0.0
9 255.128.0.0
10 255.192.0.0
11 255.224.0.0
12 255.240.0.0
13 255.248.0.0
14 255.252.0.0
15 255.254.0.0
16 255.255.0.0
17 255.255.128.0
18 255.255.192.0
19 255.255.224.0
20 255.255.240.0
21 255.255.248.0
22 255.255.252.0
23 255.255.254.0
24 255.255.255.0
25 255.255.255.128
26 255.255.255.192
27 255.255.255.224
100 | F-Secure Policy Manager | NSC notation for netmasks