Take a deep breath. It's not as scary as it looks...I promise.

If you're not already familiar with it, coaxial cable (seen above) is that round, usually white, sorta stiff cable that once carried all forms of pay TV services, including cable and satellite-based subscriptions. The cabling was run throughout just about every home that ever had a pay TV or internet connection for several decades. 

But, as technology marched on, many of us moved away from these TV services in favor of streaming our TV and movies over the internet. For a time, this left many homes still using a single coaxial cable line to carry their broadband signal to a modem, but even those have largely been replaced by Ethernet due to many ISPs requiring its usage for service tiers over 100Mbps. 

Because of these transitions, millions of homes have seemingly useless coaxial cables and coaxial outlets emerging from walls and floors. But, don't rip all that cabling out just yet. With a couple of relatively inexpensive adapters, you can use those lines that already spiderweb across your home to carry the same data that would otherwise require hundreds of feet of expensive-to-install Ethernet cabling.

 Review: Slow internet at home? This adapter can turn your unused coaxial cable into Ethernet

In fact, one of these adapters can connect any two devices that use Ethernet connections