Certified Wireless Specialist (CWS-101) — Questions and Answers

Question 1: When planning AP placement to achieve -67 dBm or better throughout an office, a specialist should consider which factor first?

DHCP lease time
Physical obstructions and building materials (Correct answer)
VLAN configuration
DNS server location

Correct answer: Physical obstructions and building materials

Building materials like concrete, metal, and glass cause significant RF attenuation that directly affects coverage planning.

Question 2: A network admin notices that an unknown AP with a familiar SSID appears in rogue AP reports. Users may be unknowingly connecting to it. What type of attack is this?

Evil twin or honeypot AP attack (Correct answer)
TKIP downgrade attack
WPS brute-force attack
Deauthentication flood

Correct answer: Evil twin or honeypot AP attack

An evil twin AP mimics a legitimate SSID to lure clients into connecting, enabling credential theft and man-in-the-middle attacks.

Question 3: How is the half-power beamwidth (HPBW) of an antenna defined?

The angular width of the main lobe where gain is within 3 dB of its maximum value (Correct answer)
The angle at which the antenna operates at half its rated frequency
The power output when the antenna is operating at 50% duty cycle
The angle between the antenna element and the mounting surface

Correct answer: The angular width of the main lobe where gain is within 3 dB of its maximum value

HPBW is the angular range of the main lobe between the two points where the antenna's gain drops to half its peak value, equivalent to a 3 dB reduction.

Question 4: When updating firmware on deployed access points as part of a quality improvement initiative, best practice dictates:

Updating all APs simultaneously during business hours
Waiting for the manufacturer to push updates automatically
Staging the update on a test AP first and rolling out during a maintenance window (Correct answer)
Only updating APs that are reporting errors

Correct answer: Staging the update on a test AP first and rolling out during a maintenance window

Staging firmware on a test unit and deploying during off-peak maintenance windows minimizes production risk.

Question 5: Which FCC enforcement action can result if a wireless installer modifies a certified device's antenna in a way not covered by its FCC authorization?

No enforcement action applies as long as the device stays under 1 watt
The device automatically receives a new FCC ID upon modification
The device is considered uncertified and its operation becomes illegal, potentially resulting in fines (Correct answer)
Only the antenna manufacturer faces liability, not the installer

Correct answer: The device is considered uncertified and its operation becomes illegal, potentially resulting in fines

Modifying an FCC-certified device beyond its authorization voids its certification, making operation illegal and exposing the installer and operator to FCC fines and enforcement.

Question 6: Which device is used to measure RF signals?

Thermal camera
Oscilloscope
Spectrum analyzer (Correct answer)
Multimeter

Correct answer: Spectrum analyzer

A spectrum analyzer is a specialized electronic instrument designed to measure the magnitude of an input signal versus frequency within a specific frequency range. It is an essential tool for identifying signal strength, detecting interference, and analyzing other characteristics of RF signals. This makes it indispensable for wireless network professionals in troubleshooting and optimization.

Question 7: After a difficult troubleshooting session that required multiple visits, what is the best way to close the client relationship for that incident?

Send a follow-up summary documenting root cause, actions taken, and any preventive recommendations (Correct answer)
Invoice the client and move on without follow-up
Apologize excessively and offer large discounts
Avoid contacting the client to prevent further complaints

Correct answer: Send a follow-up summary documenting root cause, actions taken, and any preventive recommendations

A post-incident summary demonstrates professionalism and provides the client with actionable information to prevent recurrence.

Question 8: Which of the following is a wireless encryption protocol?

FTP
SMTP
WPA2 (Correct answer)
HTTP

Correct answer: WPA2

WPA2 (Wi-Fi Protected Access II) is a robust and widely adopted security protocol used to secure wireless computer networks. It provides strong encryption and authentication, protecting data transmitted over Wi-Fi from unauthorized access. HTTP, FTP, and SMTP are application-layer protocols, not encryption protocols.

Question 9: When onboarding a new enterprise wireless client, which early communication step reduces project risk the most?

Delegating all communication to a junior technician
Beginning installation before the design phase
Skipping the requirements document to save time
Conducting a kick-off meeting to align stakeholders on goals, timelines, and responsibilities (Correct answer)

Correct answer: Conducting a kick-off meeting to align stakeholders on goals, timelines, and responsibilities

A structured kick-off meeting aligns all stakeholders early, reducing misunderstandings and scope changes that increase project risk.

Question 10: Which security vulnerability does the KRACK (Key Reinstallation Attack) exploit in WPA2?

Forged EAPOL-Start frames to disrupt authentication
IV collision in TKIP encryption
Nonce reuse caused by replaying handshake messages (Correct answer)
Weak passphrase brute-force during the 4-way handshake

Correct answer: Nonce reuse caused by replaying handshake messages

KRACK exploits the WPA2 4-way handshake by forcing nonce reuse through handshake message replay, allowing decryption of encrypted traffic.

Question 11: During a wireless assessment, an engineer observes high retry rates (>15%) on a 5 GHz AP despite strong RSSI values. Which diagnostic step BEST confirms or rules out a hidden node problem?

Enable BSS coloring on the AP to mark and discard unwanted frames
Capture 802.11 frames and look for overlapping transmissions from clients the AP cannot hear (Correct answer)
Reduce the AP transmit power by 6 dB and recheck retry rates
Switch the AP channel to a DFS channel to reduce co-channel interference

Correct answer: Capture 802.11 frames and look for overlapping transmissions from clients the AP cannot hear

Capturing frames and identifying transmissions that collide without the AP detecting them provides direct evidence of a hidden node condition.

Question 12: Which 802.11 standard feature, when misconfigured, most commonly degrades overall WLAN performance in high-density environments?

DHCP lease duration
SSID broadcast interval
Legacy data rate support (1 and 2 Mbps) (Correct answer)
WPA3 encryption overhead

Correct answer: Legacy data rate support (1 and 2 Mbps)

Enabling legacy low data rates causes slower clients to occupy airtime longer, degrading throughput for all users in the cell.

Question 13: A client insists on placing an access point in a location you know will cause coverage issues. How should you handle this?

Tell the client their opinion does not matter
Refuse to install anything until the client agrees with your plan
Document your professional recommendation in writing and note the client's override decision (Correct answer)
Install it without comment to keep the client happy

Correct answer: Document your professional recommendation in writing and note the client's override decision

Documenting the professional recommendation and the client's override protects the technician and keeps a clear record of decision-making.

Question 14: In a risk assessment, the likelihood of a denial-of-service attack via 802.11 deauthentication frames is rated HIGH. Which control BEST mitigates this specific risk?

Enabling band steering
Implementing SSID cloaking
Deploying WPA3 with Protected Management Frames (PMF) (Correct answer)
Using WPA2-Enterprise with RADIUS

Correct answer: Deploying WPA3 with Protected Management Frames (PMF)

WPA3 mandates Protected Management Frames (PMF/802.11w), which cryptographically protects deauthentication and disassociation frames, preventing spoofed deauth attacks.

Question 15: What is beamforming as implemented in 802.11ac and 802.11ax (Wi-Fi 6) wireless standards?

Configuring multiple access points to collectively aim their signals at a common area
Physically reshaping antenna elements to form a beam toward a target client
Using multiple separate frequency channels to form a broader aggregate beam
Steering the transmitted signal toward specific client devices using phase-shifted antenna arrays to improve signal quality (Correct answer)

Correct answer: Steering the transmitted signal toward specific client devices using phase-shifted antenna arrays to improve signal quality

Beamforming uses signal processing to adjust the phase and amplitude of signals across multiple antenna elements, effectively steering the transmitted beam toward a specific client device to improve SNR and throughput.

Question 16: A company wants employees to access internal resources via Wi-Fi while preventing access to social media. Which solution enforces this without client software?

Enable 802.11w on the SSID
Configure role-based access control on the wireless controller with URL filtering policies (Correct answer)
Increase firewall MTU size
Use WPA3-SAE encryption only

Correct answer: Configure role-based access control on the wireless controller with URL filtering policies

Role-based access control on wireless controllers applies per-user or per-SSID policies including URL filtering without requiring agents on endpoints.

Question 17: A customer asks why their 5 GHz devices perform better near the access point but worse far away compared to 2.4 GHz. What do you tell them?

The difference is due to antenna polarity only
5 GHz has higher frequency, resulting in shorter range but higher throughput up close (Correct answer)
5 GHz has lower frequency and therefore less wall penetration
2.4 GHz is always faster at all distances

Correct answer: 5 GHz has higher frequency, resulting in shorter range but higher throughput up close

Higher frequency signals attenuate more quickly through obstacles, reducing range while offering greater throughput at close distances.

Question 18: What distinguishes quality assurance from quality control in Certified Wireless Specialist practice?

QC is more important than QA
They are identical concepts
QA prevents defects through process design while QC detects defects through inspection (Correct answer)
QA applies only to manufacturing settings

Correct answer: QA prevents defects through process design while QC detects defects through inspection

Quality assurance is proactive (preventing defects) while quality control is reactive (detecting defects), and both are essential in Certified Wireless Specialist practice.

Question 19: What term describes the process by which an RF signal bounces off a flat, smooth surface such as a metal wall?

Scattering
Diffraction
Reflection (Correct answer)
Absorption

Correct answer: Reflection

Reflection occurs when an RF wave strikes a smooth, flat surface and bounces back at an angle equal to the angle of incidence.

Question 20: What is the function of the 802.11k amendment?

Enables radio resource measurement to assist client roaming decisions (Correct answer)
Provides mesh networking capabilities
Specifies QoS mechanisms for voice and video
Defines fast BSS transition for low-latency roaming

Correct answer: Enables radio resource measurement to assist client roaming decisions

802.11k provides Radio Resource Management (RRM), allowing APs to share neighbor reports with clients so they can make better-informed roaming decisions.

Question 21: What is the purpose of an active site survey compared to a passive one?

It physically inspects cable runs
It only records existing signals without transmitting
It audits firewall rules
It transmits test traffic to measure throughput, latency, and packet loss (Correct answer)

Correct answer: It transmits test traffic to measure throughput, latency, and packet loss

An active site survey transmits actual data packets to test real-world throughput, latency, and packet loss under load.

Question 22: What is the primary purpose of a post-installation validation survey?

To identify where future APs should be placed for expansion
To verify the deployed network meets the design requirements and coverage goals (Correct answer)
To sell additional hardware to the client
To satisfy a legal audit requirement only

Correct answer: To verify the deployed network meets the design requirements and coverage goals

Post-installation validation confirms that the deployed WLAN meets the design specifications and coverage objectives established before installation.

Question 23: A wireless engineer finds that channel utilization consistently exceeds 70% in a high-density auditorium. What evidence-based design change is MOST appropriate?

Reduce the number of APs to lower the number of BSSIDs
Widen channel width from 20 MHz to 40 MHz to increase capacity
Increase AP transmit power to override the interference
Add APs on non-overlapping channels to distribute the load (Correct answer)

Correct answer: Add APs on non-overlapping channels to distribute the load

Adding APs on non-overlapping channels distributes client load and reduces per-AP utilization, which is the evidence-based solution for channel saturation.

Question 24: During a post-deployment validation walk, you notice a -80 dBm signal at a location where -65 dBm was specified. What should you check first?

Client's operating system version
DNS server response time
Whether the AP is powered on, correctly mounted, and transmitting at the planned power level (Correct answer)
The WPA2 key complexity

Correct answer: Whether the AP is powered on, correctly mounted, and transmitting at the planned power level

Before investigating complex causes, verify the AP is operational, properly oriented, and transmitting at the specified Tx power matching the design.

Question 25: In a MU-MIMO downlink transmission, what is the maximum number of simultaneous spatial streams supported by 802.11ac Wave 2?

8
2
4 (Correct answer)
16

Correct answer: 4

802.11ac Wave 2 supports downlink MU-MIMO with up to 4 simultaneous spatial streams transmitted to different clients at the same time.

Question 26: Which site survey deliverable is most important for client approval and project documentation?

A formal report with floor plan AP placement, channel plan, and coverage heat maps (Correct answer)
Router login credentials
Raw packet capture files
DHCP server logs

Correct answer: A formal report with floor plan AP placement, channel plan, and coverage heat maps

A formal report with AP placement diagrams, channel plans, and coverage heat maps serves as the official design record and client deliverable.

Question 27: A client asks why their wireless network needs periodic reassessment even after a successful initial deployment. You should explain that:

Reassessments are only needed when performance is already degraded
Once deployed, wireless networks never need to be reviewed
Only hardware failures require reassessment
Environmental changes, new devices, and evolving applications can alter RF conditions and capacity needs over time (Correct answer)

Correct answer: Environmental changes, new devices, and evolving applications can alter RF conditions and capacity needs over time

Wireless environments are dynamic; new interference sources, increased device density, and application changes all affect network performance over time.

Question 28: What is the primary cause of the 'sticky client' problem in WLANs?

Duplicate IP address conflicts
DNS resolution failures
Clients holding onto a weak AP association instead of roaming to a stronger AP (Correct answer)
Clients connecting to hidden SSIDs

Correct answer: Clients holding onto a weak AP association instead of roaming to a stronger AP

Sticky clients are devices that remain associated with a distant or overloaded AP instead of roaming to a closer, stronger one, degrading performance.

Question 29: What is the role of the Distribution System (DS) in an infrastructure-mode WLAN?

Encrypts traffic between client and AP
Assigns IP addresses to wireless clients
Manages QoS prioritization for voice traffic
Connects access points to each other and to wired networks (Correct answer)

Correct answer: Connects access points to each other and to wired networks

The Distribution System interconnects APs and bridges wireless traffic to the wired LAN, enabling roaming and inter-AP communication.

Question 30: What role does network interface card (NIC) play?

Stores data
Prints documents
Filters spam
Connects a device to a network (Correct answer)

Correct answer: Connects a device to a network

A Network Interface Card (NIC) is a crucial hardware component that enables a computer or other network device to connect to a network. It acts as an intermediary, translating data between the device's operating system and the network medium, whether it's a wired Ethernet cable or a wireless Wi-Fi signal. Without a NIC, a device cannot communicate over a network.

Question 31: When a client asks 'How many access points do I need?', the most professional response begins with:

Providing a fixed ratio of 1 AP per 1,000 square feet without further inquiry
Always recommend the maximum number possible
Asking about the building size, construction materials, number of concurrent users, and applications in use (Correct answer)
Telling the client to Google the answer

Correct answer: Asking about the building size, construction materials, number of concurrent users, and applications in use

AP count depends on coverage requirements, capacity needs, and environment; a needs assessment must precede any recommendation.

Question 32: Which tool is most commonly used during a passive site survey?

Spectrum analyzer only
An oscilloscope
A cable toner
A laptop with Wi-Fi adapter and site survey software (Correct answer)

Correct answer: A laptop with Wi-Fi adapter and site survey software

Passive surveys use a laptop with a Wi-Fi adapter and survey software to listen to existing RF signals without transmitting.

Question 33: What does SSID stand for?

Service Set Identifier (Correct answer)
Secure Signal Identifier
System Server Internet Designator
Signal Security Interface Device

Correct answer: Service Set Identifier

SSID stands for Service Set Identifier. It is the name of a Wi-Fi network that users see when they search for available networks. It acts as a unique identifier for a wireless local area network (WLAN).

Question 34: Which antenna property describes the ratio of power radiated in a specific direction versus an isotropic radiator?

EIRP
Antenna efficiency
Beamwidth
Antenna gain (dBi) (Correct answer)

Correct answer: Antenna gain (dBi)

Antenna gain in dBi expresses how much more signal an antenna radiates in its primary direction compared to a theoretical isotropic radiator.

Question 35: The Plan-Do-Check-Act (PDCA) cycle is applied to wireless deployments primarily to:

Generate documentation for customer billing
Automate AP firmware updates
Comply with FCC licensing requirements
Drive iterative improvement in installation and operations processes (Correct answer)

Correct answer: Drive iterative improvement in installation and operations processes

PDCA provides a repeating cycle of planning changes, implementing them, measuring results, and acting on findings to continuously improve processes.

Question 36: How do CWS professionals establish measurable quality objectives?

Defining specific, measurable, achievable, relevant, and time-bound targets (Correct answer)
Using vague aspirational goals
Comparing only to competitors
Through subjective assessment alone

Correct answer: Defining specific, measurable, achievable, relevant, and time-bound targets

Quality objectives in CWS practice follow SMART criteria to ensure they can be tracked, achieved, and meaningfully evaluated.

Question 37: Why is polarization matching important when aligning antennas in a point-to-point wireless link?

To reduce the number of antennas required at each end of the link
To ensure both antennas operate on the same regulatory frequency band
To maximize received signal strength and minimize polarization mismatch loss between the link endpoints (Correct answer)
To comply with FCC power limits for licensed point-to-point systems

Correct answer: To maximize received signal strength and minimize polarization mismatch loss between the link endpoints

When transmit and receive antennas share the same polarization orientation (e.g., both vertical), signal transfer is maximized; a cross-polarized mismatch can cause up to 20–30 dB of signal loss.

Question 38: You are designing a wireless network for an outdoor stadium seating 50,000 people. Which deployment strategy best addresses high user density?

Deploy only 2.4 GHz for maximum range
Use a single high-power AP per section
Deploy directional sector antennas aimed at seating sections with small, controlled cells (Correct answer)
Mount high-gain omnidirectional APs on the scoreboard

Correct answer: Deploy directional sector antennas aimed at seating sections with small, controlled cells

Directional antennas focused on seating sections create many small, low-interference cells, distributing client load across more APs and channels.

Question 39: What is the typical channel width used for 802.11ac (Wi-Fi 5) deployments to maximize throughput?

40 MHz
20 MHz
160 MHz
80 MHz (Correct answer)

Correct answer: 80 MHz

80 MHz channels are the standard for 802.11ac deployments, balancing high throughput with reasonable interference management.

Question 40: A retail store experiences checkout system failures every Friday afternoon. A spectrum analyzer shows a strong non-802.11 signal around 2.45 GHz at those times. What is the likely cause?

Channel overlap from neighboring store APs
Customer smartphones causing interference
A microwave oven operating during lunch prep nearby (Correct answer)
Bluetooth headsets from staff

Correct answer: A microwave oven operating during lunch prep nearby

Microwave ovens emit broadband interference centered near 2.45 GHz, which can severely disrupt 2.4 GHz Wi-Fi during cooking operations.

Question 41: Which 802.11 feature allows an AP to dynamically switch channels to avoid radar interference in the 5 GHz band?

DFS (Dynamic Frequency Selection) (Correct answer)
BSS Coloring
TPC (Transmit Power Control)
MU-MIMO

Correct answer: DFS (Dynamic Frequency Selection)

DFS enables APs to detect radar systems and automatically move to a different channel to avoid interference, as required by FCC/ETSI regulations.

Question 42: What type of device connects computers within the same network?

Access Point
Modem
Switch (Correct answer)
Firewall

Correct answer: Switch

A network switch is a fundamental device that connects multiple computers and other network devices within the same local area network (LAN). Unlike a hub, a switch intelligently forwards data packets only to the intended recipient device, based on their MAC addresses. This directed communication significantly improves network efficiency and performance.

Question 43: A company discovers its Wi-Fi network is vulnerable to a KRACK attack. Which layer of the OSI model is primarily targeted by this exploit?

Physical layer
Transport layer
Network layer
Data Link layer (Correct answer)

Correct answer: Data Link layer

KRACK (Key Reinstallation Attack) targets the 4-way handshake process at the Data Link layer (Layer 2) of the OSI model, specifically the WPA2 protocol.

Question 44: What is the typical range of a standard Wi-Fi router indoors?

25 feet
150 feet (Correct answer)
500 feet
50 feet

Correct answer: 150 feet

The typical indoor range for a standard Wi-Fi router operating on the 2.4 GHz band is approximately 100-150 feet (30-45 meters). This range can vary significantly depending on environmental factors like walls, interference, and the specific router model and antenna configuration.

Question 45: What does RSSI measure in a wireless network?

The ratio of signal to noise at the receiver
The retransmission rate of a wireless client
The relative received signal strength from an AP (Correct answer)
The encryption key strength of a WPA session

Correct answer: The relative received signal strength from an AP

RSSI (Received Signal Strength Indicator) is a relative measure of the power of the received radio signal, typically expressed in dBm.

Question 46: A technician configures syslog on a wireless LAN controller to send event messages to an external server. What is the default UDP port used by syslog?

161
1812
514 (Correct answer)
162

Correct answer: 514

Syslog uses UDP port 514 by default for sending log messages from network devices to a centralized syslog server.

Question 47: What is the effective data rate impact when a 802.11n client connects using a 40 MHz channel compared to a 20 MHz channel under ideal conditions?

No change; only range improves
4x the throughput
Approximately double the throughput (Correct answer)
10% increase

Correct answer: Approximately double the throughput

Doubling the channel width from 20 MHz to 40 MHz approximately doubles the available data rate by fitting twice as many subcarriers.

Question 48: Which FCC rule establishes the maximum permissible exposure (MPE) limits for RF radiation to which wireless equipment operators must comply?

FCC Part 24 for personal communications services
ANSI C95.1 as adopted by OSHA only
FCC Part 15 Subpart B
OET Bulletin 65 and FCC §1.1310 (Correct answer)

Correct answer: OET Bulletin 65 and FCC §1.1310

FCC §1.1310 establishes RF exposure limits (MPE), and OET Bulletin 65 provides the evaluation procedures for demonstrating compliance with those limits.

Question 49: What is MU-MIMO and how does it improve WLAN performance?

Maximum Uplink Monitoring for Internet and Mobile Operations — a monitoring protocol
Multi-User Multiple Input Multiple Output — allows an AP to transmit to multiple clients simultaneously, increasing throughput (Correct answer)
Multi-Utility Managed IP Management Optimization — a QoS standard
Multi-Unit Management Interface Module — a centralized controller feature

Correct answer: Multi-User Multiple Input Multiple Output — allows an AP to transmit to multiple clients simultaneously, increasing throughput

MU-MIMO allows a single AP to communicate with multiple clients at the same time using spatial streams, significantly improving overall network throughput.

Question 50: Which wireless security control specifically addresses the risk of unauthorized devices joining the network by validating hardware identity before association?

Power level control
Channel bonding
MAC address filtering (Correct answer)
SSID hiding

Correct answer: MAC address filtering

MAC address filtering validates the hardware address of devices before allowing network association, though it is considered a weak control since MAC addresses can be spoofed.

Question 51: A client complains that a particular area has intermittent connectivity despite showing full signal bars. What should you explain?

Signal strength and throughput are different; interference or channel congestion can cause issues even with strong signal (Correct answer)
Full signal bars always guarantee connectivity
The problem must be the client's devices
Intermittent issues cannot be diagnosed

Correct answer: Signal strength and throughput are different; interference or channel congestion can cause issues even with strong signal

RSSI indicates received signal strength, but SNR, channel utilization, and interference also heavily affect actual connectivity quality.

Question 52: What is the recommended minimum RSSI value (in dBm) for reliable VoIP over Wi-Fi?

-67 dBm (Correct answer)
-70 dBm
-90 dBm
-50 dBm

Correct answer: -67 dBm

A minimum RSSI of -67 dBm is commonly recommended for VoIP applications to ensure low latency and packet loss.

Question 53: What is a MAC address used for?

To assign usernames
To identify devices on a network (Correct answer)
To locate GPS position
To measure signal strength

Correct answer: To identify devices on a network

A MAC (Media Access Control) address is a unique identifier assigned to network interfaces for communications within a network segment. It serves as a hardware address that uniquely identifies each device on a network, allowing data to be directed to the correct recipient at the data link layer.

Question 54: A CWS technician exports a packet capture file from Wireshark. Which file extension is standard for this type of capture file?

.csv
.cfg
.snmp
.pcap (Correct answer)

Correct answer: .pcap

Wireshark saves packet captures in the .pcap (or .pcapng) format, which is the industry-standard format for network packet capture files.

Question 55: During a site survey, you measure a -75 dBm signal at the far edge of a conference room. Users report frequent disconnections. What should you do?

Disable lower data rates
Switch to 5 GHz only
Add an AP to improve coverage and raise the signal floor (Correct answer)
Increase AP transmit power to maximum

Correct answer: Add an AP to improve coverage and raise the signal floor

Adding an AP to reduce cell size raises the signal level at the coverage edge, improving reliability and reducing disconnections.

Question 56: Which professional attribute distinguishes a CWS-certified technician from a self-taught installer in the eyes of enterprise clients?

The ability to install APs faster than competitors
Demonstrated knowledge of industry standards, ethical practices, and vendor-neutral troubleshooting methodology (Correct answer)
Exclusive use of premium-brand equipment
Certification from a single major hardware vendor

Correct answer: Demonstrated knowledge of industry standards, ethical practices, and vendor-neutral troubleshooting methodology

CWS certification signals mastery of vendor-neutral standards, ethical professional conduct, and structured troubleshooting—valued by enterprise clients.

Question 57: A client reports that their IoT sensors connect successfully but cannot reach the internet. The AP shows they are associated and have IP addresses. What should you check?

Lower the beacon interval
Check 802.11n spatial stream count
Verify the VLAN routing configuration and firewall rules for the IoT network segment (Correct answer)
Increase AP channel width to 80 MHz

Correct answer: Verify the VLAN routing configuration and firewall rules for the IoT network segment

If clients have IPs but no internet, the problem is typically L3 routing or firewall policy, not the wireless connection itself.

Question 58: A specialist is planning a high-density wireless deployment for a stadium. Which design approach is most appropriate?

Use only 2.4 GHz to maximize range
Deploy a single high-gain omnidirectional AP at center field
Use high-power APs spaced far apart
Use low-power, directional APs deployed in an under-seat or overhead pattern to reduce cell size (Correct answer)

Correct answer: Use low-power, directional APs deployed in an under-seat or overhead pattern to reduce cell size

High-density deployments require small cells with low transmit power and directional antennas to serve many clients per unit area.

Question 59: A security camera system uses 802.11n at 2.4 GHz and frequently drops frames. The cameras are stationary. What change would most improve reliability?

Extend DHCP lease time to 7 days
Enable WPS on the AP
Increase video resolution settings
Move cameras to a dedicated 5 GHz SSID to avoid 2.4 GHz congestion (Correct answer)

Correct answer: Move cameras to a dedicated 5 GHz SSID to avoid 2.4 GHz congestion

The 2.4 GHz band is more congested with only 3 non-overlapping channels; moving stationary cameras to 5 GHz provides more channels and less interference.

Question 60: Which phenomenon causes a wireless signal to bend around corners or obstacles?

Refraction
Scattering
Reflection
Diffraction (Correct answer)

Correct answer: Diffraction

Diffraction allows RF signals to bend around the edges of obstacles, enabling coverage in areas not in direct line of sight.

Certified Wireless Specialist (CWS-101)

The CWS certification validates entry-level knowledge of 802.11 wireless networking fundamentals, RF characteristics, wireless hardware and software, and organizational Wi-Fi use cases. It is a CWNP foundational certification for IT professionals, sales, and support roles.

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