Which of the following connectivity issues is likely to occur within a token ring network?（）

An administrator is trying to isolate the location of a persistent connectivity problem caused by a faulty NIC.
Which of the following diagrams would assist the technician in finding the machine that is causing the problem?（）

A technician needs to troubleshoot connectivity between two devices located on the same network.
Which of the following BEST describes the type of protocol being used?（）