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The slowest shared link limits end-to-end throughput. That does not establish microbursts overwhelm small queues even with low interval averages.

Optical transceiver compatibility and receive-light measurements diagnose the physical signal path before higher-layer work. That does not establish microbursts overwhelm small queues even with low interval averages.

Too many devices contend for the same radio channel. That does not establish microbursts overwhelm small queues even with low interval averages.

Upgrade or rebalance the constrained link after validating demand would not meet the need for pMTUD support or correct tunnel MSS clamping for the available MTU.

Applying suitable queue management and bandwidth shaping at the egress bottleneck would not meet the need for pMTUD support or correct tunnel MSS clamping for the available MTU.

Adjusting traffic pacing or appropriate buffering and QoS policies would not meet the need for pMTUD support or correct tunnel MSS clamping for the available MTU.

The saturated hop identifies the limiting component. That check cannot demonstrate probe the path with varying DF packet lengths.

Compare channel utilization and airtime wait after retuning. That check cannot demonstrate probe the path with varying DF packet lengths.

Lower loaded RTT validates active queue management. That check cannot demonstrate probe the path with varying DF packet lengths.

The slowest shared link limits end-to-end throughput. That does not establish supported frame size across the required link path.

Microbursts overwhelm small queues even with low interval averages. That does not establish supported frame size across the required link path.

Optical transceiver compatibility and receive-light measurements diagnose the physical signal path before higher-layer work. The missing change involves path MTU is smaller than endpoint packet size.

Reduce channel widths and replan nonoverlapping cells as needed would not address the need for survey spectrum and change channel or move affected clients to suitable 5GHz.

Upgrade or rebalance the constrained link after validating demand would not address the need for survey spectrum and change channel or move affected clients to suitable 5GHz.

Replan AP channels and steer capable clients to less-contended bands would not address the need for survey spectrum and change channel or move affected clients to suitable 5GHz.

Measure building-wide throughput and channel busy time. That check cannot demonstrate correlate spectrum spikes with retry rates before and after mitigation.

Compare channel utilization and airtime wait after retuning. That check cannot demonstrate correlate spectrum spikes with retry rates before and after mitigation.

The saturated hop identifies the limiting component. That check cannot demonstrate correlate spectrum spikes with retry rates before and after mitigation.

Overly wide channels increase contention and limit channel reuse. That does not establish an intermittent 2.4GHz interferer disrupts radio reception.

The slowest shared link limits end-to-end throughput. That does not establish an intermittent 2.4GHz interferer disrupts radio reception.

Too many devices contend for the same radio channel. That does not establish an intermittent 2.4GHz interferer disrupts radio reception.

Applying supported QoS queueing and validating buffering for real-time traffic would not apply suitable queue management and bandwidth shaping at the egress bottleneck.

Selecting latency-tolerant applications or lower-latency transport where required would not apply suitable queue management and bandwidth shaping at the egress bottleneck.

Configuring mutually compatible duplex and negotiation at both interfaces would not apply suitable queue management and bandwidth shaping at the egress bottleneck.

Compare channel utilization and airtime wait after retuning. It does not measure loaded versus unloaded latency after queue tuning.

Compare RTT on the satellite and a terrestrial backup link. It does not measure loaded versus unloaded latency after queue tuning.

Measure RTP interarrival jitter and call quality under load. It does not measure loaded versus unloaded latency after queue tuning.

VoIP is sensitive to variation in delay even without full link saturation. The missing change involves excessive buffering builds long queues on the saturated uplink.

Propagation delay is inherently high on that path. That does not establish excessive buffering builds long queues on the saturated uplink.

Both link ends disagree on duplex operation. That does not establish excessive buffering builds long queues on the saturated uplink.

Querying affected names using nslookup against specific recursive and authoritative servers would not meet the need for ping with expected ICMP filtering caveats to test echo reachability.

Running a tightly scoped authorized Nmap TCP scan would not meet the need for ping with expected ICMP filtering caveats to test echo reachability.

Running ipconfig /all and inspecting the complete adapter configuration would not meet the need for ping with expected ICMP filtering caveats to test echo reachability.