GB0-341-ENU試験無料問題集（270題）「H3CSE-WLAN 認定」

出題：1

The best way to determine the signal transmission distance between wireless devices is _______.

A. Visually inspect the transmission distance

B. Use the path loss calculation formula to calculate the transmission distance

C. Use AP for field test to determine the transmission distance

D. Use a strong linear light source to estimate the RF signal.

正解：C 解答を投票する

出題：2

According to the working principle of the wireless air interface competition mechanism (CSMA/CA), it is recommended that the number of nodes participating in the competition should not exceed ______, because when the competition point reaches ________, air interface conflicts will rise sharply. In actual business, to ensure the effective bandwidth of users, it is recommended that the number of concurrent users under each P AP does not exceed _______.

A. 64 ； 64 ； 48

B. 50 ； 50 ； 40

C. 40 ； 40 ； 30

D. 20 ； 20 ； 15

正解：D 解答を投票する

出題：3

In the wireless networking that uses the controller WX5002 and AP WA2110, if you need to perform 802.1X authentication for wireless users, which of the following command needs to be configured first?

A. port-security tx-key-type 11key

B. port-security authorization ignore

C. dot1x authentication-method pap

D. port-security enable

正解：D 解答を投票する

出題：4

Which of the following are commonly used hardware tools for wireless network surveys? (Multiple choice)

A. wireshark

B. Digital Camera

C. Various types of gain antennas, tapes, straps, etc.

D. Enterprise-class wireless network card

E. Terminal equipment used by customers in actual business, such as PDA, WIFI phone, etc.

F. AP

正解：B,C,D,E,F 解答を投票する

出題：5

The maximum transmit power of indoor WLAN equipment is generally not to be exceeded ___.

A. 1000mW

B. 500mW

C. 100mW

D. 50mW

正解：C 解答を投票する

出題：6

The 802.11 protocol that defines QoS in WLAN is?

A. 802.11e

正解：A 解答を投票する

出題：7

In a certain SBSS system, if all A STA are configured with high priority according to e 802.11e, the performance and throughput of the entire network can be improved.

A. True

B. False

正解：B 解答を投票する

出題：8

Which is not correct about the air interface utilization?

A. The AP line is not connected to the terminal, and the air interface utilization rate is 0

正解：A 解答を投票する

出題：9

On the horizontal plane pattern, on both sides of the maximum radiation direction, the angle between the two directions where the radiation power decreases is called the horizontal beam width.

A. 1dB

B. 6dB

C. 3dB

D. 10dB

正解：C 解答を投票する

出題：10

In the WPA security mode of 802.11i, how does the 802.1x method differ from the PSK (Pre-Shared Key) method in terms of security encryption? (Multiple choice)

A. Through the username, password and certificate to determine whether the user's identity is legal

B. The certificate method can ensure the uniqueness and dynamics of the generated key

C. Encryption algorithm can use two methods, TKIP and CCMP

D. The master key used to encrypt data is generated through interactive negotiation between STA and Radius

正解：A,B,D 解答を投票する

出題：11

WLAN "Theoretical Maximum Transmission Rate" usually refers to the transmission rate of large-byte (0 1500 bytes) packets, but in most networks, there are more small-byte (below 250 bytes) packets. Will seriously affect the actual application performance of WLAN, making it far below the theoretical maximum rate.

A. True

B. False

正解：A 解答を投票する

出題：12

Which of the following statements about wireless bridges are correct? (Multiple choice)

A. For long-distance bridging, it is generally used with high-gain directional antennas, and ensure that the Fresnel zone between the AP connections at both ends of the bridge is free from obstruction.

B. Fat AP and fat AP can bridge each other

C. Thin AP and thin AP cannot bridge each other

D. Fat AP and thin AP can bridge each other

E. Bridged links can be cascaded, but because each level of bridge will bring about 50% of the link bandwidth loss and increase the delay, it is not recommended to use multi-level bridge cascading

正解：A,B,D,E 解答を投票する

出題：13

The wireless technology features below H3C can meet the requirements of government industry customers for security and confidentiality.

A. WAPI

正解：A 解答を投票する

出題：14

The "WPA-Personal" or "WPA2-Personal" network authentication method uses _ to prevent unauthorized network access. Generally, you need to enter a text phrase with 8 to 63 characters.

A. WEP

B. PEAP

C. PSK

D. EAP-TLS

正解：C 解答を投票する

出題：15

What are the correct statements about the wireless architecture of rail transit? (Multiple choice)

A. Fast handover of wireless links is realized based on key parameters and handover rules

B. The vehicle-mounted AP adopts the FAT mode, and uses the MLSP protocol to realize fast switching with the trackside AP

C. The trackside AP uses FIT AP, which is connected to the wireless controller via the network cable through the access switch

D. When the vehicle AP switches, the MLSP protocol agent sends protocol messages to update the trackside network device table entries

正解：A,B,C,D 解答を投票する

出題：16

Which of the following equipment that generates 2.4GHz electromagnetic waves? (Multiple choice)

A. Bluetooth mobile phone

B. Traditional fixed telephone

C. Microwave

D. AP

正解：A,C,D 解答を投票する

出題：17

The concepts of receiving sensitivity and maximum transmit power are consistent, and both express the same meaning.

A. True

B. False

正解：B 解答を投票する

出題：18

Regarding the MAC layer of 802.11, which is correct? (Multiple choice)

A. Control frames are control messages that assist in sending data frames, such as RTS, CTS, ACK, etc.

B. 802.11 MAC messages are divided into data frames, control frames and management frames.

C. The management frame is responsible for the ability level interaction, authentication, association and other management tasks between STA and AP. For example, the Beacon frame is a kind of management frame

D. The MAC layer of 802.11 is responsible for the communication between the client and the AP. The main functions include scanning, authentication and association.

正解：A,B,C,D 解答を投票する

GB0-341-ENU試験無料問題集「H3CSE-WLAN 認定」