“Every user at one location on your company’s WAN is unable to reach the Internet. Your colleague on the network management team suspects a critical router is unable to connect to the network. Because you’re in the building affected by the outage, she asks you to troubleshoot the router. You confirm that the router is not responding to any requests over the network. Which of the following do you use to connect directly from your laptop to the router to diagnose it?”
A serial cable