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DES-3326S Layer 3 Fast Ethernet Switch User’s Guide
Switch Management and Operating Concepts 87
# of
Bits
Subnet Mask CID
R
Nota
tion
# of
Subnets
# of
Hosts
Total Hosts
2 255.192.0.0 /10 2 419430
2
8388604
3 255.224.0.0 /11 6 209715
0
12582900
4 255.240.0.0 /12 14 104857
4
14680036
5 255.248.0.0 /13 30 524286 15728580
6 255.252.0.0 /14 62 262142 16252804
7 255.254.0.0 /15 126 131070 16514820
8 255.255.0.0 /16 254 65534 16645636
9 255.255.128.0 /17 510 32766 16710660
10 255.255.192.0 /18 1022 16382 16742404
11 255.255.224.0 /19 2046 8190 16756740
12 255.255.240.0 /20 4094 4094 16760836
13 255.255.248.0 /21 8190 2046 16756740
14 255.255.252.0 /22 16382 1022 16742404
15 255.255.254.0 /23 32766 510 16710660
16 255.255.255.0 /24 65534 254 16645636
17 255.255.255.1
28
/25 131070 126 16514820
18 255.255.255.1
92
/26 262142 62 16252804
19 255.255.255.2
24
/27 525286 30 15728580
20 255.255.255.2
40
/28 104857
4
14 14680036
21 255.255.255.2
48
/29 209715
0
6 12582900
22 255.255.255.2
52
/30 419430
2
2 8388604
Table 5-9. Class A Subnet Masks
# of
Bits
Subnet Mask CIDR
Notation
# of
Subnets
# of
Hosts
Total
Hosts
2 255.255.192 /18 2 16382 32764
3 255.255.224.0 /19 6 8190 49140
4 255.255.240.0 /20 14 4094 57316
5 255.255.248.0 /21 30 2046 61380
6 255.255.252.0 /22 62 1022 63364
7 255.255.254.0 /23 126 510 64260