ZyXEL NWA-3160 User Manual download pdf (Page 110)

Chapter 7 System Screens

NWA-3160 Series User’s Guide

110

7.1.2 What You Need To Know About the System Screens

The following terms and concepts may help as you read through the chapter.

IP Address Assignment

Every computer on the Internet must have a unique IP address. If your networks

are isolated from the Internet, for instance, only between your two branch offices,

you can assign any IP addresses to the hosts without problems. However, the

Internet Assigned Numbers Authority (IANA) has reserved the following three

blocks of IP addresses specifically for private networks.

You can obtain your IP address from the IANA, from an ISP or have it assigned by

a private network. If you belong to a small organization and your Internet access

is through an ISP, the ISP can provide you with the Internet addresses for your

local networks. On the other hand, if you are part of a much larger organization,

you should consult your network administrator for the appropriate IP addresses.

Note: Regardless of your particular situation, do not create an arbitrary IP address;

always follow the guidelines above. For more information on address

assignment, please refer to RFC 1597, Address Allocation for Private Internets

and RFC 1466, Guidelines for Management of IP Address Space.

IP Address and Subnet Mask

Similar to the way houses on a street share a common street name, computers on

a LAN share one common network number.

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. 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. Let's say you select 192.168.1.0 as

the network number; which covers 254 individual addresses, from 192.168.1.1 to

192.168.1.254 (zero and 255 are reserved). In other words, the first three

numbers specify the network number while the last number identifies an individual

computer on that network.

Table 18 Private IP Address Ranges

10.0.0.0 - 10.255.255.255

172.16.0.0 - 172.31.255.255

192.168.0.0 - 192.168.255.255

1 2 ... 105 106 107 108 109 110 111 112 113 114 115 ... 371 372

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