The best replacement for subnets is vlans.

The best alternatives to subnets are rated as following:
★★★★★  vlans

Your alternative for subnets is not listed? Suggest!
Speaking about subnets, one probably shouldn't forget about subnet mask.

Other search terms related to subnets and their ratings are:
★★★★★ subnet mask
★★★★ class b
★★ vlan
★ class b addresses
You have in mind a companion for subnets and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of subnets in all years. Click on graph for more.
subnets
vlans