4.2 Given a scenario, use appropriate hardware tools to troubleshoot connectivity issues.

4.2 Given a scenario, use appropriate hardware tools to troubleshoot connectivity issues.
 * Cable tester
 * Cable certifier
 * Crimper
 * Butt set
 * Toner probe
 * Punch down tool
 * Protocol analyzer
 * Loop back plug
 * TDR
 * OTDR
 * Multimeter
 * Environmental monitor