Cisco CCNA WLAN Architectures and Concepts 3

Question 1

A network engineer configures a WLC to use local mode for APs in the headquarters building. What is a key characteristic of local mode?

Accepted Answer

All client data is tunneled through CAPWAP to the WLC for centralized switching

Answer

In local mode, all client data frames are encapsulated in CAPWAP tunnels and sent to the WLC, which then forwards them to the appropriate network.

Question 2

What is the primary role of a WLAN Distribution System (DS)?

Accepted Answer

To interconnect multiple BSSs to form an ESS via a wired backbone

Answer

The Distribution System interconnects multiple access points (BSSs) using a wired backbone, forming an Extended Service Set (ESS) for seamless roaming.

Question 3

Which 802.11 band characteristic makes 5 GHz preferable to 2.4 GHz in dense environments?

Accepted Answer

5 GHz has more non-overlapping channels and typically less interference

Answer

The 5 GHz band offers up to 24 non-overlapping channels (in the US) compared to only 3 in 2.4 GHz, reducing co-channel interference in dense deployments.

Question 4

In a Cisco WLC deployment, what happens during the CAPWAP discovery process when an AP first boots?

Accepted Answer

The AP broadcasts/multicasts a CAPWAP Discovery Request and the WLC responds with a Discovery Response

Answer

An AP sends CAPWAP Discovery Requests via broadcast, multicast, or preconfigured unicast to locate a WLC, which replies with a Discovery Response.

Question 5

Which wireless security protocol replaced TKIP with CCMP/AES as its mandatory encryption method?

Accepted Answer

WPA2

Answer

WPA2 mandates CCMP with AES encryption, replacing the weaker TKIP used in WPA and making it significantly more secure.

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Cisco CCNA WLAN Architectures and Concepts 3