Overview
Module: Network Operations
Activity type: Quiz / retrieval practice
Target: ≥80%
Objective: Distinguish an IP address, a transport protocol, and a port number
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Questions
In plain words: Read this block, then try the next action. If you feel stuck, tap What this means.
- What three values are normally needed to distinguish a transport endpoint in this lesson?
- Why are TCP port 53 and UDP port 53 considered separate endpoints?
- Does allowing inbound traffic to a port automatically start a service on that port?
- What is the security advantage of binding a test service to 127.0.0.1 instead of a wildcard address?
- What does an ingress default of DROP mean when no explicit rule matches?
- Why is an established-traffic rule useful in a stateful policy?
- In the simulated policy, why is local-web accepted while remote-web is dropped?
- What happens to the local-web packet when the rule's destination port is changed from 18080 to 18081?
- Why should real remote firewall changes be made only with a tested recovery path?
- Does successful local loopback communication prove that a service is remotely reachable?
In plain words: Loopback talks only to this computer. Ping 127.0.0.1 to check the local IP stack.
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After scoring
In plain words: Read this block, then try the next action. If you feel stuck, tap What this means.
- Missed items → return to Reading → redo Feynman Retry → reattempt.
In plain words: Big idea: - Missed items → return to Reading → redo Feynman Retry → reattempt.
In plain words: Home Assistant watches sensors and runs if-this-then-that rules for your house.