While there are certainly people who can identify the ports from looking at them, it is sometimes the case that cameras use proprietary connections with standard-seeming connectors. Rather than this method of investigation, it'd be better to start with the brand and model number of the camera and then to find the manual online — this is easily done with any major (or minor but legitimate) brand camera made in the last two decades. The manual will explain. (There will likely be a labeled diagram in the first few pages identifying all of the controls, dials, switches, and ports.)