RFC 821
E35264
RFC 821 is the original Internet standard that formally defined the Simple Mail Transfer Protocol (SMTP) for electronic mail transmission.
All labels observed (1)
| Label | Occurrences |
|---|---|
| RFC 821 canonical | 10 |
How this entity was disambiguated
This entity first appeared as the object of triple T270507 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: RFC 821 Context triple: [SMTP, originallyDefinedIn, RFC 821]
-
A.
RFC 5321
RFC 5321 is the Internet standard that specifies the Simple Mail Transfer Protocol (SMTP) used for email transmission across IP networks.
-
B.
RFC 791
RFC 791 is the foundational Internet standard that specifies the design, structure, and operation of the Internet Protocol version 4 (IPv4).
-
C.
RFC 792
RFC 792 is the Internet standard document that specifies the Internet Control Message Protocol (ICMP), which is used for network diagnostics and error reporting in IP networks.
-
D.
RFC 1035
RFC 1035 is an Internet standards document that defines the implementation details, message formats, and operational procedures for the Domain Name System (DNS).
-
E.
RFC 826
RFC 826 is the Internet standard document that specifies the Address Resolution Protocol (ARP), which maps IP addresses to physical hardware addresses on local networks.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: RFC 821 Target entity description: RFC 821 is the original Internet standard that formally defined the Simple Mail Transfer Protocol (SMTP) for electronic mail transmission.
-
A.
RFC 5321
RFC 5321 is the Internet standard that specifies the Simple Mail Transfer Protocol (SMTP) used for email transmission across IP networks.
-
B.
RFC 791
RFC 791 is the foundational Internet standard that specifies the design, structure, and operation of the Internet Protocol version 4 (IPv4).
-
C.
RFC 792
RFC 792 is the Internet standard document that specifies the Internet Control Message Protocol (ICMP), which is used for network diagnostics and error reporting in IP networks.
-
D.
RFC 1035
RFC 1035 is an Internet standards document that defines the implementation details, message formats, and operational procedures for the Domain Name System (DNS).
-
E.
RFC 826
RFC 826 is the Internet standard document that specifies the Address Resolution Protocol (ARP), which maps IP addresses to physical hardware addresses on local networks.
- F. None of above. chosen
Statements (51)
| Predicate | Object |
|---|---|
| instanceOf |
Internet standard
ⓘ
Request for Comments ⓘ |
| abbreviation | SMTP ⓘ |
| appliesTo |
Internet
ⓘ
linked to:
the internet
TCP/IP networks ⓘ |
| area |
Internet protocols
ⓘ
email ⓘ |
| author | Jonathan B. Postel ⓘ |
| category | Standards Track ⓘ |
| commandSetIncludes |
DATA
ⓘ
EXPN ⓘ HELO ⓘ HELP ⓘ MAIL ⓘ NOOP ⓘ QUIT ⓘ RCPT ⓘ RSET ⓘ VRFY ⓘ |
| defaultPort | 25 ⓘ |
| defines |
SMTP session model
ⓘ
commands for SMTP ⓘ mail transfer procedures ⓘ replies for SMTP ⓘ use of TCP port 25 for SMTP ⓘ |
| definesProtocol |
Simple Mail Transfer Protocol
ⓘ
linked to:
SMTP
|
| definesRole |
SMTP gateway
ⓘ
SMTP receiver ⓘ SMTP relay ⓘ SMTP sender ⓘ |
| doesNotSpecify | message format ⓘ |
| editor | Jonathan B. Postel ⓘ |
| focusesOn |
electronic mail transmission
ⓘ
message transfer between mail servers ⓘ |
| influenced |
RFC 2821
ⓘ
linked to:
RFC 5321
RFC 5321 ⓘ |
| language | English ⓘ |
| messageFormatSpecifiedBy | RFC 822 ⓘ |
| networkModelLayer | application layer ⓘ |
| obsoletedBy |
RFC 2821
ⓘ
linked to:
RFC 5321
RFC 5321 ⓘ |
| protocolType | application-layer protocol ⓘ |
| publicationYear | 1982 ⓘ |
| publishedBy |
Internet Activities Board
ⓘ
Internet Configuration Control Board ⓘ
linked to:
Internet Architecture Board
Internet Engineering Task Force ⓘ |
| publishedIn | August 1982 ⓘ |
| standardizes | SMTP ⓘ |
| status | Obsoleted ⓘ |
| title |
Simple Mail Transfer Protocol
ⓘ
linked to:
SMTP
|
| transportProtocol |
TCP
ⓘ
linked to:
Transmission Control Protocol
|
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: RFC 821 Description of subject: RFC 821 is the original Internet standard that formally defined the Simple Mail Transfer Protocol (SMTP) for electronic mail transmission.
Referenced by (10)
Full triples — surface form annotated when it differs from this entity's canonical label.