Which choice is a NID placed at the demarcation point between an ISP and customer's networks that can be used as a troubleshooting tool when diagnosing a network issue?

  • Protocol Analyzer
  • Smart jack
  • DMZ
  • Line validator

CompTIA Network+ N10-006
  • Network Architecture
  • Network operations
    • This question is filed here
  • Network security
  • Troubleshooting
  • Industry standards, practices, and network theory