Edimax BR-6524n Manual page 69

Suggestions on IP address numbering plan:
If you have no idea on how to define an IP address plan for your
network, here are some suggestions.
1. A valid IP address has 4 fields: a.b.c.d, for most of home and
company users, it's suggested to use 192.168.c.d, where c is
an integer between 0 and 254, and d is an integer between 1
and 254. This router is capable to work with up to 253 clients,
so you can set 'd' field of IP address of router as 1 or 254 (or
any number between 1 and 254), and pick a number between 0
and 254 for field 'c'.
2. In most cases, you should use '255.255.255.0' as subnet mask,
which allows up to 253 clients (this also meets router's
capability of working with up to 253 clients).
3. For all servers and network devices which will provide
services to other people (like Internet service, print service,
and file service), they should use static IP address. Give each
of them a unique number between 1 and 253, and maintain a
list, so everyone can locate those servers easily.
4. For computers which are not dedicated to provide specific
service to others, they should use dynamic IP address.
If you don't really understand the descriptions listed above, don't
worry! We will provide recommended setup values below.