How did railroads contribute to urban growth during the second industrial revolution?
by providing the greatest number of jobs
by transporting raw materials and finished goods
by transporting materials to parks and museums
by providing immigrants with access to enclaves

What is wi-fi infrastructure? a metropolitan area network that uses radio signals to transmit and receive data a communications technology aimed at providing high-speed wireless data over metropolitan area networks a means by which portable devices can connect wirelessly to a local area network, using access points that send and receive data via radio waves includes the inner workings of a wi-fi service or utility, including the signal transmitters, towers, or poles and additional equipment required to send out a wi-fi signal