The document discusses different types of data communication connections. Modems are used to transmit digital data over standard phone lines at speeds up to 56 Kbps. Newer digital phone lines and broadband connections allow for faster transmission speeds. Digital subscriber line (DSL) and cable modem connections provide speeds between 100 Kbps to 30 Mbps for home users. Wireless networks use Wi-Fi to transmit data without cables at speeds up to 56 Mbps over distances of 50 to 150 meters from an access point.