One of the most widely used network topologies (and the one most often used in medium to large Local Area Networks) is the bus network. A bus network uses a cable to which are attached all the network devices, either directly or through a junction box of some sort. Each device uses a transceiver to connect to the backbone. The manner of attachment depends on the type of bus network, the protocol in use, and the speed of the network. The main cable that is used to connect all t....

In the early days of the phone system, you picked up a telephone and talked to an operator who put your call through. As more people got phone lines, the phone company began to replace its operators with special switching equipment. When you dialed a number, your telephone sent a signal to the switching equipment, which routed your call to its destination. Such switching systems could handle more calls more efficiently than human operators, but they also opened the door to pho....

A Nokia mobile phone works with either the GSM network or the CDMA network. You need to choose the right model to match your wireless operator.Not all Nokia smartphones work with all wireless operators everywhere in the world. Wireless operators build their networks using different technologies, and a given phone typically works with only one of the network technologies.If you got your Nokia smartphone directly from the wireless....