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Another method is creating a spreadsheet to keep track of your static IP assignments. 
This is acceptable if you don't have a better solution; it doesn't have to be anything 
fancy. Among the usual components, such as the device info and IP address, I also 
include the MAC address of each device on the spreadsheet, which will come in 
handy when we set up our DHCP server in the next section:
Figure 11.1: An example IP address layout spreadsheet
Although subnetting is beyond the scope of this book, it's definitely something 
you should look into if you're not already familiar with it. As you can see from my 
example layout, our number of available addresses is rather limited with a 24-bit 
network. However, this layout will serve as an example we can follow that's good 
enough for the remainder of the chapter. At this point, just think about the factors 
that are important to your organization, and ensure that any networks you create 
are scalable and accommodate your needs.
Now that we have an IP layout (if we didn't have one already), we can take a 
look at setting up a DHCP server, which will be the service that will ultimately 
be assigning these IPs.