Continue your lesson
Tie every forwarding decision to interface state, Layer 2 state, addressing, routing, and policy.
Block 1 of 1Compare 10.0.0.0/8 · 172.16.0.0/12 · 192.168.0.0/16 · Public IPv4 address
Current · 7 min
Compare 10.0.0.0/8 · 172.16.0.0/12 · 192.168.0.0/16 · Public IPv4 address
Optional concept notes
10.0.0.0/8
Provides the largest RFC 1918 private IPv4 address block.
172.16.0.0/12
Provides the RFC 1918 private range from 172.16 through 172.31.
192.168.0.0/16
Provides the RFC 1918 private range beginning with 192.168.
Public IPv4 address
Uses globally routable address space outside special private ranges.
Complete one provider lesson, then answer four related questions. That is enough for today; more practice is optional.
Your lesson stays open here while the provider opens in another tab. Choose one source; the notes above are optional.
Practice the reasoning here
Write or inspect a small Cisco configuration, name the expected show-command evidence, and explain how a frame or packet crosses it.
- State the expected result before changing or testing anything.
- Name the observation, command, log, or report that would confirm it.
- Explain why the closest alternative does not fit the same requirement.
Check the whole objective
This unlocks objective 1.7 for recall. The latest checkpoint needs 70% or higher; a lower result puts the lesson back near the front of your timeline.