ZyXEL Communications Network Router wireless active fiber router Manual de usuario Pagina 122

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Appendix B IP Addresses and Subnetting
FSG1100HN User’s Guide
122
The following table is a summary for subnet planning on a network with a 16-bit
network number.
16-bit Network Number Subnet Planning
NO. “BORROWED”
HOST BITS
SUBNET MASK
NO.
SUBNETS
NO. HOSTS
PER SUBNET
1
255.255.255.0 (/17)
2
32766
2
255.255.255.0 (/18)
4
16382
3
255.255.255.0 (/19)
8
8190
4
255.255.255.0 (/20)
16
4094
5
255.255.255.0 (/21)
32
2046
6
255.255.255.0 (/22)
64
1022
7
255.255.255.0 (/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
13
255.255.255.248 (/29)
8192
6
14
255.255.255.252 (/30)
16384
2
15
255.255.255.254 (/31)
32768
1
Configuring IP Addresses
Where you obtain your network number depends on your particular situation. If
the ISP or your network administrator assigns you a block of registered IP
addresses, follow their instructions in selecting the IP addresses and the subnet
mask.
If the ISP did not explicitly give you an IP network number, then most likely you
have a single user account and the ISP will assign you a dynamic IP address
when the connection is established. If this is the case, it is recommended that
you select a network number from 192.168.0.0 to 192.168.255.0. The Internet
Assigned Number Authority (IANA) reserved this block of addresses specifically
for private use; please do not use any other number unless you are told
otherwise. You must also enable Network Address Translation (NAT) on the
FSG1100HN.
Once you have decided on the network number, pick an IP address for your
FSG1100HN that is easy to remember (for instance, 192.168.1.254) but make
sure that no other device on your network is using that IP address.
The subnet mask specifies the network number portion of an IP address. Your
FSG1100HN will compute the subnet mask automatically based on the IP
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