Data Communications over Standard Telephone Lines - ModemsMost telephone lines are analog, not digital.modem converts it from analog format to digital format.
` The analog signal (audible) is sent through telephone lines. 011010001 MODEM MODEM 011010001 Digital signal Digital signal This modem converts This modem converts digital to analog. analog to digital.
Broadband Connectionstransmit data faster than is possible through a standard dial up connection using a modem. The most commonly used digital telephone services are: ISDN,T1 and T3 DSL Cable Modems ATM
Wireless communicationUse RF or IR to transmit data between devices on LAN.Wireless signals are electromagnetic waves that can travel through a vacuum of outer space.
Categories of wireless Communication WiFi WIMAX WANWLAN
Local Area Networks (LANs)Connected by a cable, infrared link, or small transmitters.Transmits data by breaking it into small pieces.Every LAN uses a protocol.
Conclusion In this presentation weExplain how computer data travels over telephone lines.Explain a modem’s function.Differentiate four types of digital data connections.Describe how wireless networks functions.