H12-311_V3.0 Exam Dumps - HCIA-WLAN V3.0

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Question # 81

Which of the following statements is true about the coverage distance design principles of a single AP (20 dBm)?

It is recommended that a 5.8 GHz AP be deployed for through-wall signal coverage.

In the same scenario, the coverage distance of a 2.4 GHz AP is smaller than that of a 5.8 GHz AP.

Inter-floor coverage is supported.

In an open area, the coverage distance is designed based on the AP's coverage capability.

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Question # 82

Which of the following statements about antenna gain are true?

When selecting the antenna gain, ensure that the beam matches the coverage area. If the coverage distance is small, select low-gain antennas with wide vertical lobes to ensure the coverage effect in the area near the antenna.

An antenna's gain quantitatively measures the degree of input power an antenna can radiate in a given direction.

An antenna's gain measures its ability to transmit and receive signals in a specific direction. It is irrelevant to the antenna model.

Antennas are passive components, and they do not amplify electromagnetic signals.

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Question # 83

Large companies have more video conferences, and QoS generally adopts the () service model.

Best Effort model

IntServ model

FIFO model

DiffServ model

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Question # 84

when AC Only one interface is connected to the aggregation layer switch, and the user traffic is directly out of the public network through the aggregation layer switch, and the networking mode that

does not flow through should be (). AC At this time

Bypass mode + tunnel forwarding

Bypass mode + direct forwarding

Direct connection mode + tunnel forwarding

Direct connection mode + direct forwarding

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Question # 85

exist WDS In the networking, it is connected to AC connected AP What is usually called ()?

Leaf AP

Middle AP

Master AP

Root AP

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Question # 86

802.11n Standard uses dual band (2.4GHz and 5GHz ), the theoretical transmission rate can reach up to 300Mbps, The actual test rate can reach arrive 100Mbps above.

True

False

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Question # 87

Among the following encryption methods, the most secure is ()

Plaintext encryption

WEP encryption

TKIP encryption

CCMP encryption

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Question # 88

If one BSS Totally by STA Composition, then BSS What is also called ()?