D-Link DES-3326 User Manual - page 90
DES-3326 Layer 3 Fast Ethernet Switch User’s Guide
76
Switch Management and Operating Concepts
17 255.255.255.128 /25
131070 126
16514820
18 255.255.255.192 /26
262142 62
16252804
19 255.255.255.224 /27
525286 30
15728580
20 255.255.255.240 /28
1048574 14
14680036
21 255.255.255.248 /29
2097150 6
12582900
22 255.255.255.252 /30
4194302 2
8388604
Table 5-7. 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
8 255.255.255.0 /24
254 254 64516
9 255.255.255.128
/25
510 126 64260
10 255.255.255.192
/26
1022 62
63364
11 255.255.255.224
/27
2046 30
61380
12 255.255.255.240
/28
4094 14
57316
13 255.255.255.248
/29
8190 6
49140
14 255.255.255.252
/30
16382 2
32764
Figure 5-8. Class B Subnet Masks
# of
Bits
Subnet Mask
CIDR
Notation
# of
Subnets
# of
Hosts
Total
Hosts
2 255.255.255.192
/26
2
62 124
3 255.255.255.224
/27
6
30 180
4 255.255.255.240
/28
14 14 196
5 255.255.255.248
/29
30 6
180
6 255.255.255.252
/30
62 2
124
Figure 5-9. Class C Subnet Masks