Each week Ross Rubin contributes Switched On, a column about consumer technology.
In the decade that WiFi has blanketed home networks across the United States, several technologies aimed at using existing wiring in the home have met with limited success. These have included MoCA (Multimedia over Coax, which has been adopted by some service providers for implementing multi-room DVRs) and HomePNA (originally for phone lines but later expanded to coax cable as well). At least three dueling standards have also sought to bring high-speed connectivity over electrical wiring
