Addressing Services & NAT

Covers Lesson 1 and Lesson 2

Checks that you can trace how a host obtains its addressing automatically, and how those private addresses are translated onto a routable public one.

Topics covered

• The DORA exchange and which messages are broadcast
• DHCP relay and when it is required
• The four NAT address terms
• PAT overload and the port field
• Isolating a NAT that installs no translations

Every question here is answerable from the first-party notes of the lessons above. You commit to an answer before you see whether it was right.

This quiz is a Week 6 milestone in its own right. Passing it does not change the completion state of any individual lesson, and you do not need it to finish the lessons it covers.

Section quiz

Addressing Services & NAT

8 questions covering Lesson 1 and Lesson 2. Answer each one before you see whether you were right.

Question 1 of 8

1. What is the correct order of the four DHCP lease messages?

2. Why is the DHCP Request broadcast, even though the client has already received an offer?

3. Clients on VLAN 20 get no address because the DHCP server sits on another subnet. Where does ip helper-address go?

4. A host can ping 8.8.8.8 successfully but cannot ping example.com. Which service is broken, and what is simultaneously proven working?

5. Inside host 192.168.1.10 reaches 8.8.8.8 through a NAT router with public address 203.0.113.5. What is the inside global address?

6. What exactly does the overload keyword add to ip nat inside source list?

7. PAT is configured, interfaces are correctly marked, and show ip nat translations is empty. show access-lists 1 shows a deny for the inside subnet. What is happening?

8. An outside customer must reach an inside web server at a fixed public address. Which NAT type is required, and why?

Back to Lesson 2 Continue to Lesson 3

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