You are working on a VoWLAN design with your customer’s wired networking team. How many distinct
priority levels do you expect for the voice applications?

What is the DSCP Per Hop Behavior equivalent classification of the 802.11e AC_VO priority level?

You are tasked with designing the WLAN to accommodate certain high density areas on your university
campus where users are highly transient (frequently come and go). With a limited DHCP pool size (subnet
mask = 255.255.252.0) for this WLAN subnet, you want to ensure that your DHCP addresses are used
efficiently and are not exhausted, which would prevent new client associations. The DHCP server is a
Windows Server 2008 machine. Your design task is to determine the best configuration to allow as many
users as possible while avoiding WLAN service interruptions and also to use the available addresses as
efficiently as possible.
What setting would be most effective at achieving this design task?

To achieve a 450 Mbps MCS, what 802.11n features (from the numbered list below) are required?
1. Frame aggregation
2. Short GI
3. 40 MHz channels
4. 2 spatial streams
5. 3 spatial streams
6. Transmit beamforming (TxBF)

Given: As the wireless network administrator for XYZ Company, you are planning to upgrade your aging
wireless network infrastructure, as well as some clients, to support 802.11n. In your research, you have
discovered that your new wireless client devices and infrastructure are 802.11n, WMM, and WMM-PS
certified by the Wi-Fi Alliance. Some of your existing client devices are 802.11a/b/g devices that do not
support WMM.
Given this information, what scenario is possible when your company’s employees begin using both types
of client devices on the new WLAN?

As an implementation engineer, you have just received initial design specs from a network designer for your
dual-band 802.11n deployment. The network design documents prescribe the following data rate
configuration for the 2.4 GHz radio:
Basic Rates — 5.5, 6, 11, 12 Mbps
Supported Rates –9, 18, 24, 36, 48, and 54 Mbps as well as MCS 0-15
What will result from this design strategy?

Given: The 802.11n APs you have selected for your public access deployment support many of the PHY
and MAC enhancements offered by the 802.11n standard. The AP is single-band (2.4

GHz) and only allows 20 MHz channels. The WLAN radio in the AP is a 3×3 802.11n chip that supports two
spatial streams.
What is the maximum MCS rate that could be supported by this AP?

As you plan a WLAN upgrade, you have assessed the network requirements and data signatures of your
applications. One of the popular applications used on your network requires high bandwidth and low to
medium Wi-Fi loss, but can tolerate moderate latency and jitter.
What application matches this description?

Given: Assume that music on hold (MOH) features are unicast only.
What VoWiFi implementations require multicast packet delivery support by the WLAN infrastructure?

Multicast video applications typically require special treatment on the Wi-Fi network due to the nature of
multicast traffic. Many vendors implement proprietary multicast-to-unicast conversion for this reason.
Which of the following is NOT a valid reason for special unicast conversion of downlink multicast traffic?