{
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    "abstract": "Recent RFCs have discussed issues with host identification in IP address-sharing systems, such as address/prefix-sharing devices and application-layer proxies. Potential solutions for revealing a host identifier in shared address deployments have also been discussed. This memo describes the design, deployment, and privacy considerations for one such solution in operational use on the Internet today that uses a TCP option to transmit a host identifier.",
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    "authors": [
      {
        "name": "Brandon Williams"
      },
      {
        "name": "Mohamed Boucadair"
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      {
        "name": "Dan Wing"
      }
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      "confidence": "high",
      "note": "Parsed from Datatracker doc page article:author (profile full names)",
      "originalValue": null,
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      "updated": "2026-10-22T01:45:36.577Z",
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    "docId": "RFC7974",
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      "confidence": "high",
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      "originalValue": null,
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      "sourceUrl": "https://www.rfc-editor.org/info/rfc7974/",
      "updated": "2026-10-22T01:45:36.577Z",
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    "docLabel": "IETF RFC 7974",
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      "sourceUrl": "https://www.rfc-editor.org/info/rfc7974/",
      "updated": "2026-10-22T01:45:36.577Z",
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    "docNumber": "7974",
    "docNumber$meta": {
      "confidence": "high",
      "note": "From the RFC index entry (rfc-index.xml <doc-id>)",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc7974/",
      "updated": "2026-10-22T01:45:36.577Z",
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    },
    "docTitle": "An Experimental TCP Option for Host Identification",
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      "confidence": "high",
      "note": "Parsed from RFC index XML title",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc7974/",
      "updated": "2026-10-22T01:45:36.577Z",
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      "confidence": "high",
      "note": "Mapped from Datatracker std_level or RFC status text",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc7974/",
      "updated": "2026-10-22T01:45:36.577Z",
      "version": "extractDocs.js@commit:acc1bcda23fc"
    },
    "doi": "10.17487/RFC7974",
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      "confidence": "high",
      "note": "Parsed from RFC index XML doi",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc7974/",
      "updated": "2026-10-22T01:45:36.577Z",
      "version": "extractDocs.js@commit:acc1bcda23fc"
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    "href": "https://doi.org/10.17487/RFC7974",
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      "confidence": "high",
      "note": "Derived from DOI (https://doi.org/<doi>)",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc7974/",
      "updated": "2026-10-22T01:45:36.577Z",
      "version": "extractDocs.js@commit:acc1bcda23fc"
    },
    "keywords": [
      "Policy Enforcement",
      "Address Sharing",
      "NAT",
      "Host Identifier"
    ],
    "keywords$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML keywords",
      "originalValue": [
        "Policy Enforcement",
        "Address Sharing",
        "NAT",
        "Host Reveal",
        "Host-ID"
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      "overridden": true,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc7974/",
      "updated": "2026-10-22T15:11:39.980Z",
      "version": "extractDocs.js@commit:0b3793d5c0eb"
    },
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    "pages$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML page-count",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc7974/",
      "updated": "2026-10-22T01:45:36.577Z",
      "version": "extractDocs.js@commit:acc1bcda23fc"
    },
    "publicationDate": "2016-10-01",
    "publicationDate$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML date",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc7974/",
      "updated": "2026-10-22T01:45:36.577Z",
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      "confidence": "high",
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      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc7974/",
      "updated": "2026-10-22T01:45:36.577Z",
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    "references": {
      "bibliographic": [
        "IETF.draft-abdo-hostid-tcpopt-implementation-03",
        "IETF.draft-williams-overlaypath-ip-tcp-rfc-04",
        "IETF.draft-wing-nat-reveal-option-03",
        "RFC1918",
        "RFC1919",
        "RFC3022",
        "RFC3135",
        "RFC5925",
        "RFC6146",
        "RFC6269",
        "RFC6296",
        "RFC6333",
        "RFC6346",
        "RFC6598",
        "RFC6619",
        "RFC6824",
        "RFC6888",
        "RFC6967",
        "RFC6978",
        "RFC7258",
        "RFC7413",
        "RFC7620"
      ],
      "bibliographic$meta": {
        "confidence": "medium",
        "flag": "MIXED_REF_LAYOUT_RISK anchored=28 proseBlocks=34 skippedAnchorBlocks=31",
        "note": "Parsed from RFC HTML references/informative sections",
        "originalValue": [],
        "reviewRequired": true,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc7974/",
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        "version": "extractDocs.js@commit:acc1bcda23fc"
      },
      "normative": [
        "RFC793",
        "RFC2119",
        "RFC4727",
        "RFC5742",
        "RFC6994"
      ],
      "normative$meta": {
        "confidence": "high",
        "note": "Parsed from RFC HTML normative references sections",
        "originalValue": [],
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc7974/",
        "updated": "2026-10-22T01:45:36.577Z",
        "version": "extractDocs.js@commit:acc1bcda23fc"
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    "resolvedHref": "https://www.rfc-editor.org/info/rfc7974/",
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      "confidence": "high",
      "note": "Final URL resolved via URL redirect verification",
      "originalValue": null,
      "source": "resolved",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc7974/",
      "updated": "2026-10-22T01:45:36.577Z",
      "version": "extractDocs.js@commit:acc1bcda23fc"
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        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc7974/",
        "updated": "2026-10-22T01:45:36.577Z",
        "version": "extractDocs.js@commit:acc1bcda23fc"
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      "errataExist": false,
      "errataExist$meta": {
        "confidence": "high",
        "note": "Derived from presence of errata links on RFC/Datatracker pages",
        "originalValue": null,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc7974/",
        "updated": "2026-10-22T01:45:36.577Z",
        "version": "extractDocs.js@commit:acc1bcda23fc"
      },
      "latestVersion": true,
      "latestVersion$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc7974/",
        "updated": "2026-10-22T01:45:36.577Z",
        "version": "extractDocs.js@commit:acc1bcda23fc"
      },
      "statusNote": "Experimental",
      "statusNote$meta": {
        "confidence": "high",
        "note": "Mapped from Datatracker doc.json std_level",
        "originalValue": null,
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc7974/",
        "updated": "2026-10-22T01:45:36.577Z",
        "version": "extractDocs.js@commit:acc1bcda23fc"
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      "superseded": false,
      "superseded$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc7974/",
        "updated": "2026-10-22T01:45:36.577Z",
        "version": "extractDocs.js@commit:acc1bcda23fc"
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