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Unit 3 Practice — Networking Foundations, Services, and Troubleshooting

Fifteen formative questions covering Weeks 7–9 before the cumulative midterm.Automatic score only. Nothing is submitted or stored as a learner grade.
  1. 1. Which device forwards traffic between IP networks?
  2. 2. What role does a switch primarily serve in a LAN?
  3. Unlabeled connector identification board with marker 5 on the lower-left compact fiber connector shape.
    Visual evidence: Use connector shape and position. The underlying board deliberately contains no connector names.
    3. Inspect the connector board. Marker 5 identifies which fiber-network connector?
  4. 4. What does a default gateway do?
  5. 5. What does a 169.254.x.x address usually indicate in this course?
  6. 6. Which service resolves hostnames to IP addresses?
  7. 7. Which service commonly uses TCP port 443?
  8. 8. What is the purpose of a DHCP reservation?
  9. 9. Which Wi-Fi band often has the greatest range/penetration in typical indoor use?
  10. 10. What does a punchdown tool do?
  11. 11. What does `ip route` show?
  12. 12. If direct IP access works but name access fails, what is the strongest suspect?
  13. 13. What is jitter?
  14. 14. What does port flapping describe?
  15. 15. What makes a network diagnosis defensible?