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ZyXEL Communications 645R-A Series User Manual

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Prestige 645R-A Series User’s Guide 
B-8  
IP 
Subnetting 
Chart B-13 Class B Subnet Planning 
NO. “BORROWED” HOST BITS 
SUBNET MASK 
NO. SUBNETS 
NO. HOSTS PER SUBNET 
(/25) 
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