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Check yourself 04-ports-protocols-and-host-firewalls: Quiz

Retrieval practice. Target >=80%.

Class 25: Ports, protocols, and host firewalls
Class 25 visual reference. Use it as the map, then prove it in the reading, lesson, and lab.

Overview

Module: Network Operations
Activity type: Quiz / retrieval practice
Target: ≥80%
Objective: Distinguish an IP address, a transport protocol, and a port number

Learn

Questions

  1. What three values are normally needed to distinguish a transport endpoint in this lesson?
  2. Why are TCP port 53 and UDP port 53 considered separate endpoints?
  3. Does allowing inbound traffic to a port automatically start a service on that port?
  4. What is the security advantage of binding a test service to 127.0.0.1 instead of a wildcard address?
  5. What does an ingress default of DROP mean when no explicit rule matches?
  6. Why is an established-traffic rule useful in a stateful policy?
  7. In the simulated policy, why is local-web accepted while remote-web is dropped?
  8. What happens to the local-web packet when the rule's destination port is changed from 18080 to 18081?
  9. Why should real remote firewall changes be made only with a tested recovery path?
  10. Does successful local loopback communication prove that a service is remotely reachable?
Learn

After scoring

  • Missed items → return to Reading → redo Feynman Retry → reattempt.
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