Networking has plenty of subtopics that can be leveraged or used and is used in almost every application you can imagine. Advanced data center deployments, basic home networks, cellular networks. They all use much of the same technologies just their implementation is a bit different.
Please use this category if you are tackling anything to do with the network layer for things like dhcp, static routes, new hardware for your network like access points or routers. This is going to be where those specialized topics will be most easily answered.