Computer Networking: An All-in-One Beginner's Guide to Understanding Communications Systems, Network Security, Internet Connections, Cybersecurity and Hacking

Good information.

No practical application. All this info can be found in wikipedia.

It is definitely for beginners.It covers the conceptual points of networking.It spells out what some of the general terminology means.It has little practical application information.It may define what a router "is" - and, what a router "does" - It doesn't get in to the nitty gritty of setting one up.If you want advice on how to set up a local/home network with a modem, a router + multiple Wifi routers, there isn't enough information on how to do that.If you want enough information on how to talk to someone about how to do it, using the terms, etc... will make you sound less stupid.