What is the primary responsibility of the physical layer in data communication?

Donna and her team of five have invented a new gadget for the science exhibition in their college. which intellectual property right will protect their invention?

Use a physical stopwatch to record the length of time it takes to run the program. calculate the difference obtained by calls to the method system.currenttimemillis() just before the start of the algorithm and just after the end of the algorithm. calculate the difference obtained by calls to the method system.currenttimemillis() at the start of the program and at the end of the program so that the elapsed time includes the display of the result. use the value returned by the method system.currenttimemillis() just after the end of the algorithm as the elapsed time.

Consider the folloeing website url: what does the "http: //" represent? a. protocal identifier. b. ftp. c. domain name d. resource name