User's Manual

Appendix A IP Addresses and Subnetting
B222s User’s Guide
185
The following t able shows I P address last octet values for each subnet .
Subnet Planning
The following table is a sum m ar y for subnet planning on a net work wit h a 24- bit net work num ber.
The following table is a sum m ar y for subnet planning on a net work wit h a 16- bit net work num ber.
Table 82 Eight Subnet s
SUBNET
SUBNET
ADDRESS
FIRST ADDRESS
LAST
ADDRESS
BROADCAST
ADDRESS
1 0 1 30 31
2 32 33 62 63
3 64 65 94 95
4 96 97 126 127
5 128 129 158 159
6 160 161 190 191
7 192 193 222 223
8 224 225 254 255
Table 83 24- bit Networ k Num ber Subnet Planning
NO. “BORROWED”
HOST BITS
SUBNET MASK NO. SUBNETS
NO. HOSTS PER
SUBNET
1 255.255.255.128 ( / 25) 2 126
2 255.255.255.192 ( / 26) 4 62
3 255.255.255.224 ( / 27) 8 30
4 255.255.255.240 ( / 28) 16 14
5 255.255.255.248 ( / 29) 32 6
6 255.255.255.252 ( / 30) 64 2
7 255.255.255.254 ( / 31) 128 1
Table 84 16- bit Networ k Num ber Subnet Planning
NO. “BORROWED”
HOST BITS
SUBNET MASK NO. SUBNETS
NO. HOSTS PER
SUBNET
1 255.255.128.0 (/ 17) 2 32766
2 255.255.192.0 (/ 18) 4 16382
3 255.255.224.0 (/ 19) 8 8190
4 255.255.240.0 (/ 20) 16 4094
5 255.255.248.0 (/ 21) 32 2046
6 255.255.252.0 (/ 22) 64 1022
7 255.255.254.0 (/ 23) 128 510
8 255.255.255.0 (/ 24) 256 254
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