ZyXEL Communications ZyXEL ZyWALL 2WE User Manual page 384

ZyWALL 2 and ZyWALL 2WE
NO. "BORROWED" HOST BITS
4
5
6
7
8
9
10
11
12
13
14
15
52
Chart K-13 Class B Subnet Planning
SUBNET MASK
255.255.240.0 (/20)
255.255.248.0 (/21)
255.255.252.0 (/22)
255.255.254.0 (/23)
255.255.255.0 (/24)
255.255.255.128
(/25)
255.255.255.192
(/26)
255.255.255.224
(/27)
255.255.255.240
(/28)
255.255.255.248
(/29)
255.255.255.252
(/30)
255.255.255.254
(/31)
NO. SUBNETS NO. HOSTS PER SUBNET
16
32
64
128
256
512
1024
2048
4096
8192
16384
32768
4094
2046
1022
510
254
126
62
30
14
6
2
1
IP Subnetting