Bulk TCP transfers on a records-office SSID crawl even though PHY rates look decent. Captures show data MPDUs without successful Block Ack agreements, so aggregation never stays enabled. What performance conclusion follows?
Select an answer to reveal the explanation.
Short Explanation
Aggregation is packing a moving van once instead of driving one lamp at a time. Without Block Ack, that packing falls apart and TCP crawls. Get BA working again so A-MPDU efficiency can return.
Full Explanation
A-MPDU aggregation with Block Ack amortizes contention and ACK overhead across many MPDUs; without a working BA agreement, stations fall back toward less efficient exchanges and TCP goodput drops despite healthy PHY rates. This ties protocol evidence (Domain 2) to performance outcomes (Domain 5). RADIUS secrets and disabling TCP window scaling do not explain or fix missing aggregation.