discuss how the network access function is predicated upon the type of media and protocols in use at each network hop. for example, the originating network might be an ethernet switched lan built upon utp media. this would dictate the use of ethernet protocols for layer 2 access and frame forwarding decisions while encoding those frames with electrical impulses for transmission across the copper conductors of the utp cable. specifically, the transmission of signals across pins 1 and 2, and the reception of signals over pins 3 and 6 of a rj45 connector