ZyXEL Communications 10 - Manual (Page 441)

ZyWALL 10~100 Series Internet Security Gateway
IP Subnetting 49
Chart J-13 Class B Subnet Planning
NO. “BORROWED” HOST BITS SUBNET MASK NO. SUBNETS NO. HOSTS PER SUBNET
9 255.255.255.128
(/25)
512 126
10 255.255.255.192
(/26)
1024 62
11 255.255.255.224
(/27)
2048 30
12 255.255.255.240
(/28)
4096 14
13 255.255.255.248
(/29)
8192 6
14 255.255.255.252
(/30)
16384 2
15 255.255.255.254
(/31)
32768 1