Ease of Compartmentalization of Your Network
With a large available pool of IP addresses to use internally a network administrator can arrange things to be compartmentalized in a rational and easily remembered fashion and networks can be broken apart easily to isolate for reasons of network performance and security.
Example:
You have a large organization that for security reasons has certain departments that do not share network resources.
You can have the main section of the organization set up as follows;
Network Devices | 192.168.1.1 to 192.168.1.25 |
Internal Servers | 192.168.1.26 to 192.168.1.50 |
Printers | 192.168.1.51 to 192.168.1.75 |
Administration Personnel | 192.168.1.76 to 192.168.1.100 |
Sales People | 192.168.1.101 to 192.168.1.200 |
Marketing | 192.168.1.201 to 192.168.1.250 |
You could then have the following groups broken off into separate subnets:
Accounting | 192.168.100.1 to 192.168.100.255 |
Research and Development | 172.16.1.1 to 172.16.255.255 |
Executive Management | 192.168.50.1 to 192.168.50.255 |
Web sites and Email Servers | 10.0.50.1 to 10.0.50.255 |
These addresses do not have to be assigned right away but can be used as planned ranges.