These are some important beginning conversations about physical connections to the Internet. While you work on the customer's printer, he continues chatting about his network and problems he's been experiencing. One complaint is that his Internet service slows down considerably in the evening. You suspect you know the cause of this problem: His neighbors arrive home in the evening and bog down the ISP's local infrastructure. To be sure, you take a quick look at the back of his modem. What type of cable connected to the WAN port would confirm your suspicions and why?