RF Fundamentals & Controller Architecture

Covers Lesson 1 and Lesson 2

Checks that you can reason about the shared medium and a channel plan, and that you can place each function correctly across the AP and the controller.

Topics covered

• CSMA/CA and the shared medium
• The 1/6/11 channel plan and adjacent-channel interference
• SSID, BSSID, and the service sets
• Split-MAC and the CAPWAP tunnels
• AP modes and WLAN-to-VLAN mapping

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 8 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

RF Fundamentals & Controller Architecture

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

Question 1 of 8

1. Why does 802.11 use CSMA/CA rather than the CSMA/CD wired Ethernet used?

2. How does an 802.11 sender learn that a frame was lost?

3. An AP is on 2.4 GHz channel 1. A second AP in overlapping coverage is set to channel 3. What is the result?

4. A laptop shows two entries for SSID "CorpWiFi" with different signal levels and different BSSIDs. What does that indicate?

5. A client is authenticated to an AP but no user data passes. Which state is it in, and why does that block traffic?

6. In the split-MAC model, which function stays on the lightweight AP?

7. Which UDP ports carry CAPWAP control and CAPWAP data?

8. In centralized mode, why is the switch port connecting a lightweight AP usually an access port rather than a trunk?

Back to Lesson 2 Continue to Lesson 3

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