def osi(user): osi7 = ['Physical(물리)', 'Datalink(데이터링크)', 'Network(네트워크)', 'Transport(전송)', 'Session(세션)', 'Presentation(표현)', 'Application(응용)'] if 1 > user > 7: print("The OSI Model has only 7 layers.") else: print(osi7[user-1]) def execute(): osi(int(input("Enter a number between 1 and 7: "))) print("The program has ended.") exit() try: execute() except ValueError: print("Please enter a valid..
