H12-311_V3.0 Exam Questions

Barker code is an 11-bit sequence (for example, 10110111000), which has advantages in wireless transmission and can effectively reduce interference, but reduces efficiency.

802.11b is a protocol based on Orthogonal Frequency Division Multiplexing (OFDM for short) technology.

The 802.11n standard uses dual frequency bands (2.4GHz and 5GHz), the theoretical transmission rate can reach up to 300Mbps, and the actual test rate can reach more than 100Mbps.

The modulation methods adopted by DSSS are BPSK and QPSK respectively.

Spread-spectrum (spread-spectrum) technology is the basis for transmitting wireless data using the ISM frequency band.

In a point-to-multipoint networking environment, one device acts as the central device, and all other devices only establish wireless bridges with the central device to realize the...

Because the maximum rate supported by 802.11a is the same as that supported by 802.11g, the 802.11a protocol is backward compatible with the 802.11g protocol.

Which of the following rates is not supported by the 802.11a protocol?

A company wants to deploy WLAN. The company purchased a batch of wireless APs that support 802.11n. After the WLAN is deployed, only wireless clients that support 802.11n can conne...

In the 802.11 frame, the value used to record the network allocation vector (NAV) is?

In the 802.11 frame, which address bit of the Address bit represents the address of the frame receiving end?

In the 802.11 frame, what is the correct correspondence between Type and frame format in the Frame Control bit?

In the 802.11 frame, when the wireless workstation sends a signal to the wireless AP, what are the values of To DS and From DS?

In the 802.11 frame, when the network uses the WDS model for signal transmission, what are the values of To DS and From DS?

In 802.11, which has the longest interval between frames?

If the AP is working in the infrastructure mode, then the working state of the AP at this time is full- duplex mode.

If a wireless client is connected to two APs with the same SSID, what is used to determine which wireless AP the wireless terminal is connected to?

If a wireless client connected to the same SSID wants to roam from one AP to another, what is the range of signal overlap between the two APs?

In the 802.11 frame, what kind of control message should the terminal send to obtain access to the wireless medium?

In the 802.11 frame, which message is used for the terminal to receive data packets in power saving mode?

In the 802.11 frame, what is the interframe interval between RTS and CTS?

When a data frame is sent and confirmed, what is the time interval before the next data frame is sent?

In the WDS point-to-point network, the backbone link between the Root AP and the Leaf AP is connected using the 5GHz frequency band. The frequency band used by the Root AP is 149,...

MIMO (Multiple input and multiple output), that is, multiple input and multiple output, wireless access points and clients using 802.11n technology can use up to three spatial stre...

What are the rates supported by 802.11a?

What are the rates supported by 802.11g?

How many subcarriers can be used to transmit data in 802.11n 20M mode?

How many subcarriers can be used to transmit data in 802.11a in 20M mode?

If an 802.11n AP supports 2*2 MIMO technology, what is the theoretical rate of this AP?

Huawei's box-type wireless controller AC6605 supports 24 PoE interfaces, and can directly supply power to APs connected to ACs in WLAN networking.

In the process of the thin AP discovering the AC, the first step is that the AP checks whether there is a pre-configured static AC IP list.

If the AP wants to obtain the IP address of the AC through the DNS server, it must first obtain its own IP address, DHCP Server and DNS IP addresses.

In WLAN networking configuration, what command must be executed on AC6605 to deliver the configuration to AP1?

Which of the following commands can configure the port of the Huawei switch to hybrid mode?

To create a user for Huawei's AC, first use the aaa command to enter the view.

The upgrade operation of Huawei wireless controller AC6605 can only be performed on the wired side of the controller.

The MEth0/0/1 interface of AC6605 is used for in-band network management, the default address is: 192.168.1.1/24, and it cannot be modified.

To upgrade the AP through FTP, you need to ensure that the AP and the FTP server can communicate with each other, and put the AP upgrade file in the FTP root directory.

Huawei AP6310AP is an outdoor AP that can support WDS function and realize point-to- multipoint wireless bridging function.

Telnet is one of the ways to remotely manage APs. It can be configured to implement telnet authentication based on username and password.

What is the command for Huawei AC6605 to switch between the wired side and the wireless side?

What is the command to check online users on AC?

Which of the following is the command to restart AC6605?

Regarding the telnet management of AC6605, which of the following statement is wrong?

Huawei wireless controller AC6605 supports user access security management through security templates, and supports four security policies: WEP, WPA/WPA2, and WAPI.

If you change the configuration parameters of the AP radio frequency, you must restart the AP before the command can take effect.

What is the recommended AC-ID () for Huawei wireless controllers when configuring enterprise network WLAN services?

Which of the following statement about SSID is wrong?

What is the VLAN which used to establish a CAPWAP tunnel VLAN for AP and AC?

eSight network management is Huawei's dedicated network management platform, but it can only manage Huawei's own equipment.