A parallel circuit is a different path for current through each of its components. A parallel circuit provides the same voltage across all its components and hence the same brightness of bulb. The voltage is the same in a parallel circuit while the voltage is  shared in a series circuit.nother example of a series circuit is a houehold lamp and a light switch. When the light switch is open, no current flows through it and therefore, no current can flow through the lamp either. When the switch is closed, current will now flow through the switch and the lamp.
Answer The Internet was originally developed by DARPA-the Defense Advanced Research Projects Agency-as a means to share information on defense research between involved universities and defense research facilities.arry G. Roberts created the first functioning long-distance computer networks in 1965 and designed the Advanced Research Projects Agency Network (ARPANET), the seed from which the modern Internet grew, in 1966.
The term network refers to any interconnected group or system designed specifically for sharing information among them. The basic goal of network infrastructure was to provide connectivity and it acted as a bridge between a communications medium and the applications that are built upon this medium. Most of the IT industry is based on network infrastructure without which almost all communications in the world would come to an end. The network infrastructure allowed the rapid development of many computer technologies related to connectivity and created a marketplace for new concepts. It is based on the standard reference model of the industry such as the four-layer Internet Protocol Suite model.