Deteriorating infrastructure—DSL networks protect the US, but the copper wires which make up these networks are way more prone to corrosion and deterioration than fiber-optic cables. DSL stands for Electronic Subscriber Line, which can be an online network that works by using phone lines to transmit digital data. For example, https://spelling-rules30875.blogsidea.com/34293085/5-simple-statements-about-spelling-rules-explained