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Check yourself 05-ipv4: Quiz

Retrieval practice. Target >=80%.

Class 15: IPv4 addresses and gateways
Class 15 visual reference. Use it as the map, then prove it in the reading, lesson, and lab.

Overview

Module: Module 1: Infrastructure & Addressing
Activity type: Quiz / retrieval practice
Target: ≥80% before topic mastery unlock
Objective: Given a host, the learner can read IPv4 address, mask, and gateway; explain network vs host bits; contrast classful charts with classless /24 math; and decide same-LAN vs via-gateway delivery.

Instruction

Instructions

Close the reading. Write answers from memory. Then self-score.

Learn

Questions

Active recall: write answers without rereading first. Target ≥80% before the gate.

  1. In plain words, why does a device need an IP address?
  2. What three fields should you record with every IPv4 interface?
  3. What does a 255 in a mask octet tell you? What does a 0 tell you?
  4. When does a host use its default gateway?
  5. On 192.168.1.0/24, what are the network and broadcast addresses?
  6. Why is “256 usable hosts” the wrong answer for that /24?
  7. Who usually assigns addresses automatically at home?
  8. About how many IPv4 addresses exist in total, and why that is not the same as “available for hosts”?
  9. Give the first-octet ranges and default masks for Classes A, B, and C. What are D and E for?
  10. Why is 127 missing between Class A and Class B? What command proves loopback?
  11. What is the difference between a classful network and a classless network? Give one example with 10.x.
Learn

After scoring

  • Missed items → return to Reading weak sections → redo Feynman Retry → reattempt missed questions.
  • Passing score unlocks marking this topic complete on the module hub (still need lab gate + homework).
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