Mixed Deck — All CWNA Topics Flashcards

The access points in your WLAN deployment are set to emit power levels of 10 mW on 2.4 GHz radios and 20 mW on 5 GHz radios. There are also a few semi-directional antennas in use. What sort of deployment is being discussed?

Answer: SOHO

A SOHO (Small Office/Home Office) deployment typically involves a limited number of users and devices, often using lower power levels and a mix of omnidirectional and possibly some semi-directional antennas to cover a smaller area efficiently. The specified power levels (10 mW on 2.4 GHz, 20 mW on 5 GHz) are relatively low, and the mention of 'a few semi-directional antennas' suggests a tailored, smaller-scale setup rather than a large standard office or high-density environment.

How should an CWNA professional present complex information to non-experts?

Answer: Translate into accessible language, use visuals, and check for understanding

This is fundamental to Wireless Network Administrator practice. Translate into accessible language, use visuals, and check for understanding represents the professional standard for communication in the CWNA certification framework.

How should an CWNA professional respond to a compliance violation?

Answer: Report it promptly, investigate the root cause, and implement corrective actions

This is fundamental to Wireless Network Administrator practice. Report it promptly, investigate the root cause, and implement corrective actions represents the professional standard for regulatory in the CWNA certification framework.

You are responsible for establishing a wireless connection between two structures on a single campus. The link must support at least 150 Mbps of data rates. Which WLAN technology role ought to be implemented?

Answer: IBSS

An IBSS (Independent Basic Service Set), also known as ad-hoc mode, allows two or more wireless devices to communicate directly with each other without the need for an Access Point. While typically used for temporary client-to-client connections, it could technically establish a direct point-to-point wireless link between two specific devices located in separate structures, creating a peer-to-peer connection for data transfer.

Which frequency band typically experiences greater signal absorption by water vapor and building materials?

Answer: Both 2.4 GHz and 5 GHz experience more than 900 MHz

Both 2.4 GHz and 5 GHz suffer greater attenuation from obstacles than 900 MHz because shorter wavelengths are absorbed more readily by materials.

How does continuous improvement apply to CWNA quality management?

Answer: It involves ongoing incremental enhancements to processes based on data and feedback

This is fundamental to Wireless Network Administrator practice. It involves ongoing incremental enhancements to processes based on data and feedback represents the professional standard for quality in the CWNA certification framework.

In dB math, what does adding 3 dB to a power level represent?

Answer: Double the power

Adding 3 dB to a power level approximately doubles the power, since 10^(3/10) ≈ 2.

What does OFDMA in 802.11ax allow compared to OFDM in earlier amendments?

Answer: Serve multiple clients simultaneously within a single channel

OFDMA divides a channel into resource units (RUs) allowing the AP to simultaneously transmit to or receive from multiple clients within one TXOP.

A wireless engineer needs to reduce co-channel interference on a 2.4 GHz network. Which set of non-overlapping channels should be used?

Answer: 1, 6, 11

In the 2.4 GHz band (US regulatory domain), channels 1, 6, and 11 are the only three non-overlapping 20 MHz channels.

A 3x3:2 AP, AP-1. a 3x3:3 client, STA-3. How many spatial streams can be used simultaneously for an HT-OFDM downlink broadcast from AP-1 to STA-3?

Answer: Two spatial streams, because the definition of the AP indicates that it is capable of only two spatial streams.

The number of spatial streams that can be used simultaneously in an 802.11 transmission is always limited by the device with the lowest capability in the link. AP-1 is defined as a 3x3:2 device, meaning it supports a maximum of 2 spatial streams. Although STA-3 supports 3 spatial streams, the AP's limitation dictates that only two spatial streams can be utilized for the downlink broadcast.

What is the most effective communication approach for CWNA professionals?

Answer: Adapting communication style to the audience while maintaining accuracy and clarity

This is fundamental to Wireless Network Administrator practice. Adapting communication style to the audience while maintaining accuracy and clarity represents the professional standard for communication in the CWNA certification framework.

What distinguishes quality assurance from quality control in Wireless Network Administrator practice?

Answer: QA focuses on preventing defects through process improvement while QC detects defects through inspection

This is fundamental to Wireless Network Administrator practice. QA focuses on preventing defects through process improvement while QC detects defects through inspection represents the professional standard for quality in the CWNA certification framework.

What is the value of written documentation in CWNA professional communication?

Answer: It creates permanent records, ensures clarity, and provides legal protection

This is fundamental to Wireless Network Administrator practice. It creates permanent records, ensures clarity, and provides legal protection represents the professional standard for communication in the CWNA certification framework.

A CWNA professional is asked to document a wireless network deployment. Which document type best captures the final installed configuration for future reference?

Answer: As-built document

An as-built document records the actual final configuration of the deployed network, serving as the authoritative reference after installation.

What distinguishes a peer-reviewed study in Wireless Network Administrator literature?

Answer: Independent experts in the field evaluated the methodology and conclusions before publication

This is fundamental to Wireless Network Administrator practice. Independent experts in the field evaluated the methodology and conclusions before publication represents the professional standard for research in the CWNA certification framework.

In 802.11ac (Wi-Fi 5), what is the maximum number of spatial streams supported?

Answer: 8

802.11ac supports up to 8 spatial streams with MU-MIMO, enabling significantly higher aggregate throughput compared to 802.11n's 4 streams.

What is the name of the ratio between the minimum voltage and maximum peak voltage on a line?

Answer: VSWR

VSWR, or Voltage Standing Wave Ratio, is a critical measurement in radio frequency engineering. It quantifies the efficiency of power transmission from a source through a transmission line to a load by measuring the ratio of the maximum to minimum voltage (or current) in a standing wave pattern. A high VSWR indicates a significant impedance mismatch, leading to power reflection and loss.

A coffee shop owner wants to provide guest Wi-Fi while protecting the POS system on the same AP. Which configuration BEST achieves this?

Answer: Configure separate SSIDs mapped to separate VLANs with firewall rules between them

VLAN segmentation with firewall policies between VLANs isolates guest traffic from the POS network while allowing both to share the same physical AP infrastructure.

Which ITU region includes the United States, Canada, and Latin America for spectrum allocation purposes?

Answer: Region 2

ITU Region 2 encompasses the Americas, where the FCC and ISED Canada align spectrum allocations with ITU Radio Regulations.

Which antenna type radiates power equally in all directions in the horizontal plane and is commonly used for general indoor coverage?

Answer: Dipole/omnidirectional

Omnidirectional antennas (such as dipoles) radiate in a 360° pattern around the antenna axis and are the most common choice for general indoor AP coverage.