A common situation with computer "stuff".
I've got both the digital and analog cables connected to my Samsung monitor. The digital cable goes to the computer it is used with, and the analog cable is available if I want to connect a laptop to it temporarily. That's the plan, anyway. Never carried out in the year and a half it's been in place.
Those Samsung monitors are nice, aren't they.
I'm sure it's like my Dell where you can connect any and all inputs and switch between them by using the buttons and menus on/in the monitor.