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Barker Code is a 11 Bit sequence (e.g. 10110111000 ), there are advantages in wireless transmission, which can effectively reduce interference, but it reduces efficiency.

A.

True

B.

False

The following pairs PSK The authentication description is wrong ().

A.

PSK Authentication requires the same pre-shared key to be configured on the wireless client and device

B.

WPA and WPA2 All support PSK Certification

C.

PSK The authentication process is similar to the shared key authentication process, so the security is the same

D.

PSK Certification is passed 4 Handshake Key Negotiate to verify STA side Key The legitimacy

802.11 There are three frame types, namely (). (Select 3 Answers)

A.

Data Frame

B.

Control frame

C.

Business frame

D.

Management frame

Capacity planning mainly starts from the aspects of equipment performance, number of users, bandwidth requirements, and wireless environment, and estimates the amount required to meet the business volume. AP number

quantity.

A.

True

B.

False

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

A.

Plaintext encryption

B.

WEP encryption

C.

TKIP encryption

D.

CCMP encryption

2.4 GHz How many channels () can the frequency band be divided into at most?

A.

14

B.

13

C.

11

D.

3

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.

A.

True

B.

False

What series of Huawei switches () is the Huawei plug-in controller ACU board suitable for?

(Select 3 Answers)

A.

S9300 series switches

B.

S9700 series switches

C.

S7700 series switches

D.

S5700 series switches

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

A.

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

B.

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

C.

Inter-floor coverage is supported.

D.

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

What was the name of the first radio communication network based on packet technology ()?

A.

INTERNET

B.

ARPANet

C.

ALOHNET

D.

NSFnet