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아직도 Cisco인증350-101시험준비를 어떻게 해야 할지 망설이고 계시나요? 고객님의 IT인증시험준비길에는 언제나 ExamPassdump가 곁을 지켜주고 있습니다. ExamPassdump시험공부자료를 선택하시면 자격증취득의 소원이 이루어집니다. Cisco인증350-101시험덤프는ExamPassdump가 최고의 선택입니다.
질문 # 98
What does a low SNR value result in?
정답：D
설명：
TheSignal-to-Noise Ratio (SNR)is an important metric used to determine the quality of a wireless signal. It compares the strength of the signal to the level of background noise. A low SNR indicates that the signal is weak relative to the noise, leading to poor signal quality.
Option D: Decreased data integrity with possible errorsis the correct answer. When SNR is low, the quality of the data transmission is compromised. The noise interferes with the signal, leading to potential data errors and a decrease in data integrity. This can cause packets to be lost or corrupted, requiring retransmissions, and reducing the overall performance and reliability of the network.
Option A: Scheduling of firmware maintenance windowsis not directly related to SNR. Firmware maintenance is unrelated to signal quality, though it might be necessary for other reasons, such as performance optimization or bug fixes.
Option B: Activation of automatic failover featuresis typically used in scenarios where there is network equipment failure or poor connection quality, but it is not directly triggered by low SNR values.
Option C: Improved channel reliabilityis the opposite of what happens when SNR is low. Low SNR leads to unreliable communication, not improved reliability.
Therefore,Option Dis correct, as a low SNR results in decreased data integrity due to possible errors in the transmission process.
질문 # 99
What is a characteristic of gain in wireless antenna design?
정답：D
설명：
In wireless antenna design, gain refers to the measure of an antenna's ability to focus energy in a particular direction compared to a reference antenna, usually an isotropic radiator. Gain does not generate additional power; instead, it redistributes radiated energy to increase signal strength in the intended direction, enhancing the effective range and performance of the wireless link. This directional amplification is crucial in both point- to-point and point-to-multipoint deployments, as higher gain antennas can concentrate RF energy to overcome path loss and improve received signal strength at the target. Option A describes system loss calculation, which relates to link budgets, not antenna gain. Option B is unrelated, as checksum figures are part of digital error detection in wireless frames. Option D pertains to environmental tolerance, not RF signal characteristics. In Cisco Wireless Core Technologies, antenna gain is considered during RF planning, coverage modeling, and site surveys to ensure optimal signal distribution, proper overlap, and minimal interference, particularly for high-density deployments. Using high-gain directional antennas in corridors or long hallways, for instance, improves coverage and throughput while minimizing interference outside the target area. Reference topics:RF Fundamentals - Antenna gain, directional radiation patterns, link budget, site survey planning.
질문 # 100
Refer to the exhibit. An engineer configured a static IP address on a LWAPP, but it is not reachable for management. The engineer configured the wrong gateway and must now change the default gateway to 172.16.100.1. Which CLI command must the engineer use?
정답：D
설명：
When deploying a Lightweight Access Point (LWAPP) in a Cisco wireless network, proper Layer
3 configuration is essential for management and connectivity to the Wireless LAN Controller (WLC). Each LWAPP requires a valid IP address, subnet mask, and default gateway to communicate beyond its local subnet. In the exhibit, the AP is assigned 172.16.100.104/24, but the previously configured gateway was incorrect, preventing communication with the WLC. Cisco IOS XE requires that the AP's IP interface be configured with the correct default gateway to route traffic properly. The correct syntax is capwap ap ip <AP-IP> <Subnet-Mask> <Default-Gateway>.
Option D matches the IP, subnet mask, and gateway for the given network, ensuring the AP can reach the WLC for LWAPP registration.
질문 # 101
Which process enables seamless Layer 2 handoff in a wireless network during roaming?
정답：A
설명：
The correct answer isfast BSS transition protocol, which is IEEE 802.11r Fast Transition. Cisco describes
802.11r BSS Fast Transition as the mechanism used to provide seamless roaming for wireless clients by reducing the time required to roam between access points. It achieves this by allowing keying material to be prepared or cached so that the client does not perform a full authentication exchange every time it moves to another AP within the same mobility domain.
This is specifically relevant to Layer 2 roaming because the client remains in the same Layer 2 network while reassociating to a different BSS. Fast Transition reduces roam latency, which is critical for voice, video, collaboration, barcode scanners, and other real-time applications. Cisco also classifies fast secure roaming as the method used to accelerate client roaming when Layer 2 security is configured on the WLAN. Increased beacon intervals do not provide handoff acceleration. Optimized roaming helps with sticky-client behavior but is not the secure handoff protocol. Deferred probe response is an RF/client steering behavior, not an 802.11 Layer 2 roaming key-transition method. Reference topics:802.11r Fast BSS Transition, Layer 2 roaming, fast secure roaming, WLAN mobility, and Catalyst 9800 roaming design.
질문 # 102
What does an elevated noise floor indicate in an RF environment?
정답：A
설명：
An elevated noise floor indicates degraded RF conditions and directly reduces wireless link reliability. Cisco defines the noise floor as the ambient RF noise level, expressed in dBm, below which received signals are unintelligible. Cisco also defines SNR as the ratio of signal strength to the noise floor, meaning that when the noise floor rises, the usable separation between the desired signal and background RF energy decreases.
For a receiver to decode frames reliably, the received signal must remain sufficiently above the noise floor.
Cisco site-survey guidance states that RF signals must be higher than the noise floor to be detectable as valid useful signals, and gives the common design example of -67 dBm signal with a -92 dBm noise floor to maintain 25 dB SNR. When the noise floor is elevated, SNR drops, clients experience more retries, lower modulation rates, reduced throughput, and possible disconnects. Cisco's high-density wireless guidance states that raised noise floor lowers SNR, translating to lower speeds and higher airtime utilization. Options B, C, and D describe unrelated timing, spectrum-planning, or bandwidth-demand concepts. Reference topics:RF Fundamentals - noise floor, SNR, RSSI, RF interference, retries, and wireless link quality.
질문 # 103
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