Huawei H12-321 Questions Answers

The AP periodically sends a Probe Request frame with the specified multicast address on different channels. After receiving the AP, the AP detects that the AP is a neighbor AP.

Active detection is mainly used to establish neighbor relationships between legal APs.

Active detection is mainly used to obtain the maximum interference signal strength between legal neighbors, the most critical of which is the signal strength of neighbor APs.

Active detection and passive detection are used to collect interference from illegal APs.

The wave has a different phase from the point source.

The wave has the same phase as the point source.

Smaller than the first Fresnel zone

Larger than the first Fresnel zone

The core of the Dynamic Channel Allocation (DCA) algorithm is the exhaustion and iteration algorithms, which list all possible AP-Channel combinations and choose the optimal combination.

The Transmit Power Control (TPC) algorithm aims to choose a proper transmit power which can meet coverage requirements of an AP.

Interference specified by the lower interference threshold is low, and within the allowed range. Two neighbor APs cannot detect interference from each other and can send packets simultaneously.

If the interference caused by a neighbor is smaller than the lower interference threshold, the algorithm determines whether to reduce the transmit power according to the difference between the interference caused by the neighbor and the lower interference threshold.

Mesh enabled RF is best to use 2.4G frequency band

The “distance” parameter configuration of adjacent Mesh nodes should be the same

It is best to configure the short GI mode to improve the air interface bandwidth of the Mesh regardless of the distance.

The power parameters of adjacent Mesh nodes should be configured identically to avoid bidirectional transmission bandwidth imbalance.