ZyXEL FSG1100HN User Guide - Page 122

Configuring Ip Addresses, No. Borrowed, Host Bits, Subnet Mask, Subnets, No. Hosts, Per Subnet

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Appendix B IP Addresses and Subnetting 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 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 SUBNET MASK 255.255.255.0 (/17) 255.255.255.0 (/18) 255.255.255.0 (/19) 255.255.255.0 (/20) 255.255.255.0 (/21) 255.255.255.0 (/22) 255.255.255.0 (/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) NO. SUBNETS 2 4 8 16 32 64 128 256 512 1024 2048 4096 8192 16384 32768 NO. HOSTS PER SUBNET 32766 16382 8190 4094 2046 1022 510 254 126 62 30 14 6 2 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 122 FSG1100HN User's Guide

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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