Continue your lesson
Follow traffic from the endpoint through each device, protocol, and service in the path.
Block 1 of 4Understand DHCP reservation
Current · 15 min
Understand DHCP reservation
Optional concept notes
DHCP reservation
Configures a DHCP server to offer a specific address to an identified client.
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 4Understand SLAAC
5 min
Understand SLAAC
Optional concept notes
SLAAC
Lets an IPv6 host form an address from router advertisements.
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 4Understand DNSSEC
17 min
Understand DNSSEC
Optional concept notes
DNSSEC
Signs DNS data so resolvers can validate origin and integrity.
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 4 of 4Understand PTR record
10 min
Understand PTR record
Optional concept notes
PTR record
Maps an IP address back to a host name.
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
Sketch a small network or packet path. Predict the expected state, introduce one fault, and identify the observation that isolates 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 3.4 for recall. The latest checkpoint needs 70% or higher; a lower result puts the lesson back near the front of your timeline.