Which current RUCKUS AP family features an AP model with a PoE output port?
B
Explanation:
The RUCKUS H Series access points are specifically designed for environments such as hospitality,
student housing, and multi-dwelling units, where compact, in-room installation is ideal. A distinctive
feature of the H Series—such as the RUCKUS H550 and H510 models—is their PoE output port,
allowing the AP to power downstream devices like IP phones, set-top boxes, or security cameras
directly through Ethernet.
This design minimizes cabling and infrastructure costs while maintaining enterprise-grade Wi-Fi
performance. According to the RUCKUS One Online Help and the official RUCKUS AI documentation,
the H550 supports 802.3af/at PoE input and provides 802.3af PoE output on one of its Ethernet
ports. The feature is highlighted as part of RUCKUS’s integrated wired and wireless connectivity
solution, combining dual-band Wi-Fi 6 access with switch-like wired connectivity for room-based
deployments.
The R Series and E Series are ceiling-mounted APs primarily used for large-area coverage and
typically do not include PoE passthrough functionality. The M Series (outdoor mesh APs) are
designed for outdoor coverage extension, also lacking this downstream PoE capability.
Reference:
RUCKUS One Online Help – Access Point Hardware Descriptions (H550, H510)
RUCKUS Analytics 3.5 User Guide – Device Inventory and AP Capability DataRUCKUSAIDocumentation–H550TechnicalOverview(docs.cloud.ruckuswireless.com/RUCKUS-AI/userguide/index.html)
When configuring a WLAN for 802.1X, which mode will provide authentication service for APs in the
event of a controller failure?
D
Explanation:
When configuring an 802.1X-secured WLAN, RUCKUS systems such as SmartZone, RUCKUS One, or
RUCKUS Cloud typically rely on an external RADIUS server for user authentication. However, in the
event of a controller failure or connectivity loss to the RADIUS server, RUCKUS APs can continue to
authenticate users locally if the local user database is enabled and configured.
The Local Authentication Database allows APs or controllers to store a limited set of credentials that
can be used when external AAA services are unavailable. This ensures continued access and
redundancy for critical WLANs without requiring external dependency. According to RUCKUS One
Online Help – WLAN Configuration and AAA Settings, enabling the Local Authentication Database
provides fallback authentication for 802.1X clients during system or connectivity failures.
In contrast, the proxy and non-proxy modes define how authentication requests are relayed to the
RADIUS server, while Dynamic PSK (DPSK) is a separate authentication method that replaces 802.1X
with per-user keys.
Reference:
RUCKUS One Online Help – WLAN Configuration: AAA Authentication and Fallback Options
RUCKUS Analytics 3.5 User Guide – Client Authentication and WLAN Events
Ruckus Cloud / RUCKUS AI Documentation – Authentication Mode Descriptions
Using the rule of 10s and 3s, how many mW does 23 dBm convert to?
B
Explanation:
The Rule of 10s and 3s is a quick mental calculation used to convert between dBm (decibel-
milliwatts) and milliwatts (mW), which represent power levels. The rule states that:
Every 10 dB increase corresponds to a 10× increase in power.
Every 3 dB increase corresponds to approximately a 2× increase in power.
Starting from 0 dBm = 1 mW:
+10 dBm = 10 mW
+20 dBm = 100 mW
Add 3 dB → 23 dBm = 100 mW × 2 ≈ 200 mW
Thus, 23 dBm converts to approximately 200 mW. This principle is used throughout RUCKUS
documentation for understanding EIRP (Effective Isotropic Radiated Power) and ensuring compliance
with regulatory transmit power limits.
According to RUCKUS One Online Help and RUCKUS AI user documentation, administrators often use
this conversion when optimizing transmit power settings to balance coverage and interference. The
rule helps design engineers translate dB settings into physical power outputs during Wi-Fi tuning and
planning.
Reference:
RUCKUS One Online Help – Radio Settings and Transmit Power Configuration
RUCKUS Analytics 3.5 User Guide – RF Metrics and Power AnalysisRUCKUSAIDocumentation–UnderstandingRFSignalLevels(docs.cloud.ruckuswireless.com/RUCKUS-AI/userguide/index.html)
Which organization certifies wireless devices as interoperable across vendors?
A
Explanation:
The Wi-Fi Alliance (WFA) is the global organization responsible for testing and certifying
interoperability of wireless LAN products based on the IEEE 802.11 standards. While the IEEE
develops and maintains the technical specifications (e.g., 802.11a/b/g/n/ac/ax), it does not perform
certification or compliance testing. Instead, the Wi-Fi Alliance ensures that certified devices from
different manufacturers operate together seamlessly under the “Wi-Fi CERTIFIED™” program.
According to RUCKUS One Online Help and the RUCKUS AI documentation, RUCKUS access points
and controllers undergo Wi-Fi Alliance certification to ensure compatibility with a wide range of
client devices, including those using WPA3, Wi-Fi 6 (802.11ax), and Wi-Fi 6E technologies. This
certification is critical for enterprise environments where heterogeneous client ecosystems exist.
The IETF focuses on internet protocols (e.g., IP, TCP), and the ISO handles broader international
standards, not wireless interoperability. Therefore, the Wi-Fi Alliance is the correct organization
ensuring cross-vendor interoperability for Wi-Fi.
Reference:
RUCKUS One Online Help – Wi-Fi Standards and Certification Overview
RUCKUS AI User Guide – Wi-Fi Alliance Certification Compliance
Wi-Fi Alliance Official Resource (www.wi-fi.org)
What is a true statement regarding MIMO in Wi-Fi networks?
B
Explanation:
MIMO (Multiple Input, Multiple Output) is a fundamental wireless technology that enhances Wi-Fi
throughput and reliability by transmitting multiple data streams simultaneously using multiple
antennas on both the transmitter and receiver. It was introduced in the IEEE 802.11n standard, which
marked the beginning of high-throughput (HT) Wi-Fi.
According to RUCKUS One Online Help and the RUCKUS Analytics 3.5 User Guide, MIMO enables
spatial multiplexing, diversity gain, and beamforming, allowing higher data rates and improved
signal quality in multipath environments. Subsequent standards (802.11ac and 802.11ax) expanded
this concept to MU-MIMO (Multi-User MIMO), allowing simultaneous communication with multiple
clients.
MIMO requires support on both the AP and client for full functionality; otherwise, the connection
falls back to single-stream operation. It is used in both uplink and downlink directions (especially in
Wi-Fi 6 and later). Thus, option B—introduced in 802.11n—is correct, while options A, C, and D are
incorrect.
Reference:
RUCKUS One Online Help – PHY Technologies and MIMO Concepts
RUCKUS Analytics 3.5 User Guide – Radio Metrics and Client PHY Data
RUCKUS AI Documentation – Wi-Fi 6 (802.11ax) MIMO and MU-MIMO Capabilities
Which technology listens to clients on both horizontal and vertical planes to determine the best
signal to use for each client?
A
Explanation:
PD-MRC (Polarization Diversity – Maximal Ratio Combining) is a patented RUCKUS technology that
enhances Wi-Fi signal reception by listening to client transmissions on both the horizontal and
vertical polarization planes. This approach helps overcome signal degradation caused by multipath,
reflections, and client device orientation.
According to the RUCKUS One Online Help and RUCKUS AI technical documentation, PD-MRC
dynamically selects and combines the signal from both polarization domains to maximize the
received signal-to-noise ratio (SNR). This technology works synergistically with BeamFlex, RUCKUS’s
adaptive antenna system, to provide optimal signal gain and link reliability per client.
SmartCast is used for traffic prioritization and QoS management, ChannelFly handles dynamic
channel selection using machine learning, and Tx Beamforming optimizes transmit signal direction.
However, none of these specifically analyze both horizontal and vertical planes simultaneously.
Therefore, PD-MRC is the correct answer—it provides improved reception performance and overall
RF robustness, especially for mobile clients in variable orientations.
Reference:
RUCKUS One Online Help – BeamFlex and PD-MRC Overview
RUCKUS Analytics 3.5 User Guide – RF Performance and Signal Quality Metrics
RUCKUS AI Documentation – Advanced RF Technologies: BeamFlex, PD-MRC, and ChannelFly
What is one advantage of RUCKUS BeamFlex+ over Transmit Beamforming?
D
Explanation:
RUCKUS BeamFlex+ is an advanced adaptive antenna technology that dynamically selects from
thousands of possible antenna patterns to optimize signal quality and performance for each client
connection. Unlike Transmit Beamforming (TxBF), which depends on feedback from client devices
that must support specific beamforming protocols, BeamFlex+ operates entirely on the access point
side.
The key advantage of BeamFlex+ is that it does not require any client-side support or compatible
drivers. It continuously analyzes signal characteristics and client locations to select the optimal
antenna pattern in real time, enhancing both range and throughput without additional client
configuration.
According to the RUCKUS One Online Help and RUCKUS AI documentation, BeamFlex+ combines
adaptive antenna pattern selection with polarization diversity (PD-MRC) to improve performance in
dynamic environments. In contrast, Tx Beamforming requires explicit feedback (channel state
information) from clients—limiting its effectiveness when clients lack driver or chipset compatibility.
Thus, the correct answer is D, as BeamFlex+ provides all the benefits of adaptive beamforming
without the need for client-side dependencies.
Reference:
RUCKUS One Online Help – BeamFlex+ and Antenna Optimization Features
RUCKUS Analytics 3.5 User Guide – RF Optimization Metrics and BeamFlex+ Insights
RUCKUS AI Documentation – Advanced Antenna Technologies (BeamFlex+ vs TxBF)
By which process does 802.11k assist in client roaming?
C
Explanation:
The IEEE 802.11k amendment enhances Wi-Fi client roaming by allowing an AP to share information
about nearby access points with connected clients. This process, known as the Neighbor Report,
provides a list of available APs that the client can use to make faster, more informed roaming
decisions.
When a client device receives this neighbor list, it can scan fewer channels, reducing latency and
improving the handoff experience—especially in enterprise networks managed by RUCKUS One,
SmartZone, or RUCKUS Cloud. According to RUCKUS One Online Help and RUCKUS AI
documentation, enabling 802.11k/v/r features together allows for fast and seamless roaming, as
802.11k supplies discovery data, 802.11v assists with steering decisions, and 802.11r enables fast re-
authentication.
Option C is correct because 802.11k’s core function is to help clients identify the best potential APs
to roam to. The other options describe unrelated functions: encryption caching relates to 802.11r,
ignoring weak clients is an AP policy function, and forcing disconnections occurs during load
balancing or steering—not through 802.11k.
Reference:
RUCKUS One Online Help – WLAN Configuration: 802.11k/v/r Roaming Enhancements
RUCKUS Analytics 3.5 User Guide – Client Mobility and Roaming Analysis
RUCKUS AI Documentation – Intelligent Roaming Optimization and Neighbor Reports
Which capability within Client Isolation will allow clients to access specific destinations within the
same subnet?
A
Explanation:
The Client Isolation feature on RUCKUS access points and controllers prevents wireless clients
connected to the same SSID from communicating directly with each other within the same subnet.
This is particularly important for guest or public networks to enhance security and privacy. However,
administrators may sometimes need to allow access to specific network services or devices—such as
printers, gateways, or media servers—within that same subnet.
RUCKUS systems address this need through the Isolation Whitelist capability. As described in the
RUCKUS One Online Help and RUCKUS Cloud documentation, the Isolation Whitelist allows
administrators to specify destination IP or MAC addresses that are exempt from client isolation rules.
This enables controlled access without fully disabling client isolation across the network.
Other options like directed multicast or access control list (ACL) manage traffic types or filtering
policies but are not specific to client-to-client communication exceptions. Therefore, the Isolation
Whitelist is the correct answer.
Reference:
RUCKUS One Online Help – WLAN Configuration: Client Isolation and Whitelist Options
RUCKUS Analytics 3.5 User Guide – WLAN and Client Policy Analysis
RUCKUS AI Documentation – Wireless Network Security and Client Isolation Controls
What unit is commonly used to display RSSI values?
B
Explanation:
RSSI (Received Signal Strength Indicator) is a key measurement representing the power level of a
received RF signal. It is typically displayed in dBm (decibel-milliwatts), a logarithmic unit that
expresses the power relative to 1 milliwatt. In Wi-Fi systems, RSSI values usually range between –30
dBm (excellent) and –90 dBm (very weak).
According to the RUCKUS One Online Help and the RUCKUS Analytics 3.5 User Guide, signal strength
metrics shown in dashboards, client views, and RF reports are represented in dBm for consistency
across platforms. This allows network engineers to correlate signal levels with client connectivity
performance and thresholds used for roaming or troubleshooting.
Other units such as dBi refer to antenna gain, Watts measure absolute power (not typically used in
client reporting), and Ohms measure resistance. Thus, dBm is the correct and standard unit used for
RSSI measurement in RUCKUS and all IEEE 802.11-based systems.
Reference:
RUCKUS One Online Help – Radio Settings and Signal Strength Indicators
RUCKUS Analytics 3.5 User Guide – Client Signal and Noise Metrics
RUCKUS AI Documentation – Understanding RSSI, SNR, and RF Metrics
Which three states are indicated by the LEDs on RUCKUS indoor APs? (Choose three.)
A, C, D
Explanation:
RUCKUS indoor Access Points use status LEDs to communicate key operational states during
deployment and runtime. The LEDs provide immediate visual feedback about the AP’s connectivity,
power condition, and client activity.
According to the RUCKUS One Online Help – Access Point LED Indicators, and verified in the RUCKUS
AI documentation, the LEDs typically display the following primary states:
Controller Connected (A): Confirms that the AP has successfully registered and established a control
session with the RUCKUS controller or RUCKUS Cloud instance.
Insufficient PoE Power (C): Indicates that the AP is receiving inadequate power, such as being
powered through 802.3af instead of 802.3at, which may disable high-power features or additional
radios.
Clients Connected to a Radio (D): Lights up when one or more clients are associated with the AP’s
wireless radios, signifying active WLAN operation.
Other listed options—USB dongle inserted, data plane tunnel connected, and routable IP assigned—
are not standard LED indications across RUCKUS indoor AP models. They may represent system
events but not physical LED states.
Reference:
RUCKUS One Online Help – Access Point LED Status Indicators
RUCKUS Analytics 3.5 User Guide – AP Connectivity and Power MonitoringRUCKUSAIDocumentation–HardwareandConnectivityIndicatorsforRUCKUSIndoorAPs(docs.cloud.ruckuswireless.com/RUCKUS-AI/userguide/index.html)
Which SmartZone controller interface is present only in the physical hardware appliance?
A
Explanation:
The Data Interface is unique to physical SmartZone (SZ) hardware appliances such as the SmartZone
100 (SZ-100) or SmartZone 300 (SZ-300). This interface handles user traffic data forwarding in
hardware-based deployments and is not present in virtualized versions such as the vSZ (Virtual
SmartZone).
According to the RUCKUS One Online Help and SmartZone system architecture descriptions, the
physical controller includes four main interfaces:
Management Interface: Handles GUI, CLI, and administrative access.
Control Interface: Manages control-plane communications with access points.
Cluster Interface: Manages synchronization and redundancy between cluster members.
Data Interface: Dedicated for data-plane traffic processing and forwarding (exclusive to physical
appliances).
Virtual SmartZone controllers use tunnel-based data forwarding (via GRE or VXLAN) instead of a
dedicated hardware Data Interface. Hence, the Data interface exists only on physical appliances,
making A the correct answer.
Reference:
RUCKUS One Online Help – SmartZone Controller Network Interfaces
RUCKUS Analytics 3.5 User Guide – Controller Data Plane Monitoring and Interface MetricsRUCKUSAIDocumentation–SmartZoneHardwareArchitectureOverview(docs.cloud.ruckuswireless.com/RUCKUS-AI/userguide/index.html)
Which type of interference occurs when two APs are configured on channel 7 and channel 8 in the
same physical space?
A
Explanation:
When two access points operate on overlapping channels in the same frequency band—such as
channel 7 and channel 8 in the 2.4 GHz range—they create Adjacent Channel Interference (ACI).
Unlike co-channel interference (CCI), which occurs when APs share the exact same channel, ACI
results from partial channel overlap that causes energy spillover between adjacent frequencies.
According to RUCKUS One Online Help – Radio Configuration and Channel Planning, adjacent
channels in 2.4 GHz are only 5 MHz apart, while each Wi-Fi channel occupies 20–22 MHz of
bandwidth. As a result, channels like 7 and 8 significantly overlap, creating degraded performance,
retransmissions, and reduced throughput.
RUCKUS’s ChannelFly technology in both RUCKUS AI and RUCKUS Analytics helps automatically
select non-overlapping channels (such as 1, 6, and 11) to minimize ACI and optimize network
capacity.
Therefore, the correct answer is A – Adjacent interference, which directly applies to overlapping
channel configurations.
Reference:
RUCKUS One Online Help – Radio Channel Planning and ChannelFly Operation
RUCKUS Analytics 3.5 User Guide – RF Interference Detection and Channel Utilization
RUCKUS AI Documentation – Channel Optimization and Interference Management
What happens when enabling spectrum analysis mode on a RUCKUS AP?
A
Explanation:
When spectrum analysis mode is enabled on a RUCKUS Access Point, the AP’s radios are temporarily
dedicated to spectrum scanning and interference analysis, meaning they cannot serve wireless
clients during that period. Therefore, new clients will not be able to join, and existing clients are
typically disconnected.
According to the RUCKUS One Online Help – Spectrum Analysis Tool and RUCKUS AI Documentation
– RF Monitoring and Optimization, spectrum analysis mode captures and reports RF energy
utilization, identifying interference sources such as non-Wi-Fi devices, microwave ovens, or
Bluetooth. The AP alternates its radio into “sniffer” mode to analyze RF characteristics, during which
client association and data traffic handling are suspended.
The output is visualized through graphs and real-time utilization charts, not histograms.
Furthermore, an AP can only scan one band (either 2.4 GHz or 5 GHz) at a time — not both
simultaneously.
Thus, the correct answer is A, since enabling spectrum analysis prevents new client associations
while the AP is in scanning mode.
Reference:
RUCKUS One Online Help – Spectrum Analysis Overview
RUCKUS Analytics 3.5 User Guide – RF Health and Interference Detection
RUCKUS AI Documentation – Spectrum Monitoring and RF Analysis Tools
An administrator has completed a new install of SmartZone-Essentials for switch management, and
has configured the SmartZone IP as the registrar IP on an ICX 7450. Which condition explains why the
switch is not connecting?
C
Explanation:
When deploying SmartZone-Essentials (SZ-100/SZ-144) for RUCKUS ICX switch management, the
switches establish a secure HTTPS-based connection to the controller using the SmartZone registrar
IP. A common issue preventing connection occurs when SmartZone is not configured to accept self-
signed certificates—which are typically used by ICX switches by default for initial onboarding.
As described in the RUCKUS One Online Help – SmartZone Switch Management Setup and RUCKUS
AI documentation, administrators must explicitly enable the option to “Allow Self-Signed
Certificates” in the controller’s Switch Management settings. Without this configuration, the
SmartZone rejects the ICX connection request during SSL/TLS handshake, causing registration failure.
SNMPv3 configuration and DHCP options are unrelated to initial controller registration. Additionally,
SmartZone-Essentials fully supports ICX management; SmartZone High Scale is not required.
Thus, the correct answer is C — the connection fails because the controller is not set to accept self-
signed certificates from the switch.
Reference:
RUCKUS One Online Help – SmartZone Switch Management and Onboarding Configuration
RUCKUS Analytics 3.5 User Guide – Device Connection and Registration Monitoring
RUCKUS AI Documentation – ICX Switch Onboarding with SmartZone Essentials