11)Most _________ today use Ethernet. a.LANs b.MANs c.PANs d.WANs 12)The Internet is a ______. a.LAN b.MAN c.PAN d.WAN Answer D 13)Global communications services providers support the use of ______. a.LANs b.MANs c.PANs d.WANs 14)Today, computer networks communicate via ______ signals; originally, the US public telephone system was a(n) _________ network. a.analog; digital b.analog; fiber c.digital; analog d.digital; fiber 15)__________ modems convert digital signals to analog for transmission over a telephone line. a.Dial-up b.DSL c.Cable d.Fiber Â