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Check the unit’s hardware revision before purchase: this ASIN does not establish it. The manufacturer evidence here is US V4.6 documentation; the independent measurements describe MBReviews’ tested unit, not every revision sold under this listing.","title":"A conditional upgrade for an older home network"}],"article":{"sections":[{"heading":"What the documented model offers","paragraphs":[{"claim_ids":["c-wifi","c-band","c-antennas","c-ports","c-link5","c-link24","c-client"],"kind":"factual","paragraph_id":"p-overview","text":"Archer AX21 is an AX1800 Wi-Fi 6 router. TP-Link’s US V4.6 datasheet specifies two bands, four antennas, one Gigabit WAN port and four Gigabit LAN ports. Its quoted wireless link rates are 1201 Mbps and 574 Mbps; these are connection rates, not promised internet throughput. Confirm your unit’s revision before applying these specifications."}],"section_id":"s-overview","section_type":"overview"},{"heading":"Measurements need their test context","paragraphs":[{"claim_ids":["c-test","c-r-speed","c-range"],"kind":"factual","paragraph_id":"p-test","text":"MBReviews measured 745 Mbps upstream and 391 Mbps downstream at close range with its tested unit. It also observed a pronounced speed decline with distance. These results describe that test setup and hardware, whose revision is not established here; they are not predictions for a different revision or home."},{"claim_ids":["c-ofdma","c-thermal"],"kind":"factual","paragraph_id":"p-capacity","text":"OFDMA support is documented, but it does not establish a tested maximum device count. MBReviews observed no overheating in its sample. Sustained-load performance, measured efficiency and long-term reliability remain gaps."}],"section_id":"s-performance","section_type":"performance"},{"heading":"Check software and expansion before buying","paragraphs":[{"claim_ids":["c-setup","c-modes","c-mesh","c-security","c-vpn","c-parental","c-client"],"kind":"factual","paragraph_id":"p-software","text":"Setup can use the web interface or Tether app. US V4.6 documentation lists router and access-point modes, OneMesh, WPA3, OpenVPN and PPTP server support, plus website filtering and time controls. Client support is required for corresponding Wi-Fi and security features. Confirm mesh and firmware compatibility for the actual unit."},{"claim_ids":["c-app-limit","c-parental"],"kind":"factual","paragraph_id":"p-limits","text":"MBReviews found the tested parental controls and QoS limited. Treat this as a practical warning if those features drive your purchase, and check the current interface for your revision. The evidence does not establish current security advisories or a support-end date."}],"section_id":"s-setup","section_type":"setup"}],"title":"TP-Link Archer AX21: capabilities, tests and revision checks"},"buyer_decisions":[{"check_before_buying":["Check the unit label, firmware and required mesh compatibility."],"claim_ids":["c-r-fit","c-app-limit","c-mesh"],"constraints":["Hardware revision must be identified."],"evidence_locator_ids":["loc-m-software","loc-d-spec"],"item_id":"b-upgrade","needs":["Wi-Fi 6 for an older home network"],"price_context_ids":[],"reason":"The evidence supports an ordinary upgrade use case, with revision and feature limitations.","rival_revisions":[],"scope":{"country":{"state":"known","values":["US"]},"firmware":{"state":"unknown"},"hardware_revision":{"state":"unknown"},"os":{"state":"not_applicable"},"variant":{"state":"known","values":["Archer AX21"]}},"title":"Upgrade after checking the revision","topic_id":"buyer_fit","tradeoffs":["Advanced controls and distance performance need closer scrutiny."],"verdict":"conditional"}],"coverage":{"buyer_decisions":{"claim_ids":["c-r-fit","c-mesh"],"reason":"Upgrade fit is supported, but the listing’s hardware revision remains unknown.","status":"partial"},"ownership_costs":{"claim_ids":[],"reason":"No price or recurring-cost observations were requested or established.","status":"not_researched"}},"evidence_revision_id":"research_evidence_revision_d322443191464f82ac189742ac71e049","faq":[{"answer":"No. The US V4.6 datasheet gives separate wireless link rates of 1201 Mbps and 574 Mbps. They are not a guaranteed download result for one device.","claim_ids":["c-link5","c-link24","c-client"],"faq_id":"f-speed","intent":"limitation","question":"Does AX1800 mean that one device gets the combined speed?","source_ids":["source_snapshot_ff48319f065544859da19b76bedc89ebe100aa7e449419ff77b4be3eeab1b49a"]},{"answer":"US V4.6 documentation lists four LAN ports plus a separate WAN port. Their documented link speed is 1 Gbps. Confirm the hardware revision on the unit.","claim_ids":["c-ports","c-wan","c-lan"],"faq_id":"f-ports","intent":"pre_purchase","question":"How many wired devices can connect?","source_ids":["source_snapshot_ff48319f065544859da19b76bedc89ebe100aa7e449419ff77b4be3eeab1b49a"]},{"answer":"OneMesh is documented for US V4.6. This ASIN does not identify the hardware revision or firmware, so verify the intended extender or mesh partner before purchase.","claim_ids":["c-mesh"],"faq_id":"f-mesh","intent":"compatibility","question":"Can I expand coverage with mesh equipment?","source_ids":["source_snapshot_ff48319f065544859da19b76bedc89ebe100aa7e449419ff77b4be3eeab1b49a"]},{"answer":"The US V4.6 datasheet lists website filtering and time controls. MBReviews found its tested controls and QoS limited; check your revision’s current features if family filtering is essential.","claim_ids":["c-parental","c-app-limit"],"faq_id":"f-controls","intent":"pre_purchase","question":"Are the parental controls comprehensive?","source_ids":["source_snapshot_ff48319f065544859da19b76bedc89ebe100aa7e449419ff77b4be3eeab1b49a","source_snapshot_f119e8162d98aabef5b3f3d804468fd9f165ea5d907ed8c7155bb15f60070827"]},{"answer":"No. MBReviews’ measurements apply to its tested unit and environment, and speed fell with distance. The evidence does not establish a guaranteed coverage area or sustained-load result for your hardware revision.","claim_ids":["c-test","c-range"],"faq_id":"f-range","intent":"limitation","question":"Will the review speeds apply throughout my home?","source_ids":["source_snapshot_f119e8162d98aabef5b3f3d804468fd9f165ea5d907ed8c7155bb15f60070827"]}],"ownership_costs":[],"price_contexts":[],"usage_scenarios":[{"assessment":"conditional","claim_ids":["c-r-fit","c-client","c-wifi"],"gap_reason":null,"limitations":["Confirm the hardware revision and client support."],"scenario_id":"u-upgrade","situation":"You have compatible Wi-Fi 6 devices and want a documented route to upgrading an older home network.","title":"Replacing an older router"},{"assessment":"suitable","claim_ids":["c-ports","c-wan","c-lan"],"gap_reason":null,"limitations":["The documented Ethernet links are gigabit, not multi-gigabit."],"scenario_id":"u-wired","situation":"You need wired connections alongside Wi-Fi; US V4.6 documentation lists one WAN port and four LAN ports.","title":"Several wired devices"},{"assessment":"conditional","claim_ids":["c-parental","c-app-limit"],"gap_reason":null,"limitations":["The tested firmware had limited parental controls and QoS.","The current feature set of an unknown hardware revision is not established."],"scenario_id":"u-controls","situation":"You need extensive filtering and traffic controls rather than website blocking and schedules.","title":"Advanced family controls"}]}},"source_schema_version":"product-research-package-v7","sources":[{"number":1,"publisher":"TP-Link","title":"Archer AX21 US V4.6 Datasheet","url":"https://static.tp-link.com/upload/product-overview/2023/202305/20230530/Archer%20AX21%28US%29%204.6_Datasheet.pdf"},{"number":2,"publisher":"MBReviews","title":"TP-Link Archer AX21 WiFi 6 Router Review, page 2","url":"https://www.mbreviews.com/tp-link-ax21-router-review/2/"},{"number":3,"publisher":"MBReviews","title":"TP-Link Archer AX21 WiFi 6 Router Review, page 1","url":"https://www.mbreviews.com/tp-link-ax21-router-review/"}]}