Continue your lesson
Tie every forwarding decision to interface state, Layer 2 state, addressing, routing, and policy.
Block 1 of 3Compare DNS · Authoritative DNS server
Current · 5 min
Compare DNS · Authoritative DNS server
Optional concept notes
DNS
Maps names to resource records such as addresses.
Cross-certificationCCNA ↔ Net+
DNS
The core idea stays the same. The surrounding objective changes the evidence, decision, or task the exam asks for.
Authoritative DNS server
Answers from the official records for a configured DNS zone.
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.
Block 2 of 3Understand DHCP
6 min
Understand DHCP
Optional concept notes
DHCP
Provides clients addressing gateways DNS servers and lease duration.
Cross-certificationCCNA ↔ Net+
DHCP
The core idea stays the same. The surrounding objective changes the evidence, decision, or task the exam asks for.
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.
Block 3 of 3Understand DHCP relay
9 min
Understand DHCP relay
Optional concept notes
DHCP relay
Forwards client broadcasts to a server on another subnet.
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 4.3 for recall. The latest checkpoint needs 70% or higher; a lower result puts the lesson back near the front of your timeline.