A fixed-memory device cannot promise to retain every access point in an arbitrarily dense environment. It can promise bounded storage, explicit truncation, stable pages and selection of the exact record the user chose. Separate the stack’s scan cache from the product’s presentation cache, then define admission, retention and stale-selection behavior for each. This guide uses…
A scan request can complete successfully while an active control link suffers unacceptable interruption. Measure the longest useful-service gap and the actual off-channel intervals separately. Total scan duration is not automatically the outage duration: a radio may revisit its home channel, queue traffic, offload scanning or share work across hardware resources. This guide uses Linux…
Packet aggregation can improve airtime efficiency, but a late control burst does not prove that aggregation caused the delay. Separate application batching, host queue residence, active aggregation state, radio transmission and receiver processing. Then compare matched workloads and supported configuration changes. A driver patch should follow that evidence, not substitute for it. This guide uses…
A gateway can upload at an acceptable average rate while control requests miss their deadline. The useful investigation is whether live traffic waits in a persistent queue, where that queue sits, and whether the proposed queue management can actually reach it. A throughput result alone does not answer those questions. This guide targets a Linux…
A high reported Wi-Fi bitrate and low useful delivery are compatible observations. The bitrate describes a radio transmission parameter; useful delivery includes contention, retries, protocol work and endpoint processing. The practical task is to align direction, measurement window and counter meaning before deciding which component limits the product. This guide uses Linux 6.12 nl80211/mac80211 statistics…
When Linux reports an rfkill block, begin by identifying the affected rfkill object and its separate hard and soft states. Then find the hardware/platform or software policy that owns the state. Repeatedly requesting scans or changing credentials cannot establish that ownership, and repeatedly unblocking the radio can fight an intentional safety or operating policy. This…
A private key stored in a token can still be unavailable when a headless product needs to authenticate. A successful desktop-assisted connection may depend on a logged-in secret agent, an already unlocked token or a provider initialized earlier in the session. Qualify the complete signing path from cold boot, under the identity and service environment…
A tunneled EAP profile contains several identities with different jobs. The outer identity helps route the authentication exchange; the server certificate identifies the tunnel endpoint; the inner identity authenticates the device or user inside that tunnel. Mixing them can produce a connection that works while exposing an unintended identity or trusting the wrong server. This…
A device can exchange ordinary data successfully and still fail when the access point changes its group key. Diagnose that event as a security-state exchange: identify the rekey trigger, the per-station group-key messages, their processing outcome and the AP’s terminal decision. Treating every periodic disconnect as a beacon or DTIM problem skips the evidence needed…
A reconnect that succeeds after an authentication-policy change does not prove that the new policy was evaluated. The client and network may reuse a cached pairwise master-key security association, or run an EAP exchange that resumes earlier method state. Establish which path occurred before concluding that a changed credential, trust rule or authorization policy works….