ZyXEL Communications NBG6503 User Manual page 173

Table 79 Eight Subnets (continued)
SUBNET
7
8
Subnet Planning
The following table is a summary for subnet planning on a network with a 24-bit network number.
Table 80 24-bit Network Number Subnet Planning
NO. "BORROWED"
HOST BITS
1
2
3
4
5
6
7
The following table is a summary for subnet planning on a network with a 16-bit network number.
Table 81 16-bit Network Number Subnet Planning
NO. "BORROWED"
HOST BITS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Appendix A IP Addresses and Subnetting
SUBNET
FIRST ADDRESS
ADDRESS
192 193
224 225
SUBNET MASK
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)
SUBNET MASK
255.255.128.0 (/17)
255.255.192.0 (/18)
255.255.224.0 (/19)
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)
NBG6503 User's Guide
LAST
ADDRESS
222
254
NO. SUBNETS
2
4
8
16
32
64
128
NO. SUBNETS
2
4
8
16
32
64
128
256
512
1024
2048
4096
8192
16384
32768
173
BROADCAST
ADDRESS
223
255
NO. HOSTS PER
SUBNET
126
62
30
14
6
2
1
NO. HOSTS PER
SUBNET
32766
16382
8190
4094
2046
1022
510
254
126
62
30
14
6
2
1