Which of the following statements about Mesh RF parameters is correct? (Multiple choice)

Question

Options

• AThe radio frequency enabled by Mesh is best to use the 2.4G frequency band
• BThe "distance" parameter configuration of adjacent Mesh nodes should be the same
• CRegardless of the distance, it is best to configure the short Gl mode to increase the air interface
• DThe power parameter configuration of adjacent Mesh nodes should be the same to avoid

• A
  16% (10)
• B
  78% (49)
• C
  6% (4)

Explanation

B and D are correct because adjacent Mesh nodes must share consistent RF parameters to maintain stable, symmetric links. The "distance" parameter controls timing (e.g., ACK timeout) - if mismatched, one node may time out before the other responds, breaking the link. Similarly, matching transmit power ensures a symmetric link: if Node A transmits at higher power than Node B, Node A can hear B but B may not reliably hear A, creating a one-way (asymmetric) connection that disrupts traffic flow.

A is wrong because Mesh backhaul links benefit more from 5GHz or higher bands, which offer greater bandwidth and less congestion than 2.4GHz. 2.4GHz is typically preferred for client access, not inter-node mesh links.

C is wrong because Short Guard Interval (Short GI) is only appropriate for short distances. At longer distances, multipath propagation delays increase the risk of inter-symbol interference, making Long GI the safer choice - so "regardless of distance" is the critical flaw here.

Memory tip: Think "Mesh neighbors must match what matters" - Distance and Power (B & D) must be mirrored between adjacent nodes because they govern timing and signal symmetry. Frequency band choice and GI mode are distance-dependent decisions, so blanket rules (A and C) are traps.

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