RFC 1519
E198873
RFC 1519 is the Internet Engineering Task Force (IETF) document that originally specified Classless Inter-Domain Routing (CIDR) for more efficient IP address allocation and routing on the Internet.
All labels observed (1)
| Label | Occurrences |
|---|---|
| RFC 1519 canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T1777478 — 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 1519 Context triple: [RFC 1901, obsoletes, RFC 1519]
-
A.
RFC 1591
RFC 1591 is an Internet standards document that defines the structure, administration, and delegation policies for top-level domains in the Domain Name System (DNS).
-
B.
RFC 1195
RFC 1195 is the IETF standard that extends the IS-IS routing protocol to support multiple network layer protocols, including IP.
-
C.
RFC 1939
RFC 1939 is the Internet standard document that specifies the Post Office Protocol version 3 (POP3) used for retrieving email from a mail server.
-
D.
RFC 2419
RFC 2419 is an earlier Internet standard related to secure shell (SSH) protocols that was later superseded by RFC 4253.
-
E.
RFC 2181
RFC 2181 is an Internet standards document that clarifies and updates the Domain Name System (DNS) specifications, particularly regarding DNS data consistency, caching, and authoritative information.
- 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 1519 Target entity description: RFC 1519 is the Internet Engineering Task Force (IETF) document that originally specified Classless Inter-Domain Routing (CIDR) for more efficient IP address allocation and routing on the Internet.
-
A.
RFC 1591
RFC 1591 is an Internet standards document that defines the structure, administration, and delegation policies for top-level domains in the Domain Name System (DNS).
-
B.
RFC 1195
RFC 1195 is the IETF standard that extends the IS-IS routing protocol to support multiple network layer protocols, including IP.
-
C.
RFC 1939
RFC 1939 is the Internet standard document that specifies the Post Office Protocol version 3 (POP3) used for retrieving email from a mail server.
-
D.
RFC 2419
RFC 2419 is an earlier Internet standard related to secure shell (SSH) protocols that was later superseded by RFC 4253.
-
E.
RFC 2181
RFC 2181 is an Internet standards document that clarifies and updates the Domain Name System (DNS) specifications, particularly regarding DNS data consistency, caching, and authoritative information.
- F. None of above. chosen
Statements (44)
| Predicate | Object |
|---|---|
| instanceOf |
IETF document
ⓘ
Request for Comments ⓘ technical standard ⓘ |
| addressesProblem |
IPv4 address space exhaustion
ⓘ
growth of global Internet routing tables ⓘ |
| appliesTo | IPv4 ⓘ |
| area |
the internet
ⓘ
surface form:
Internet
|
| category | Standards Track ⓘ |
| defines | Classless Inter-Domain Routing ⓘ |
| definesAbbreviation |
Classless Inter-Domain Routing
ⓘ
surface form:
CIDR
|
| definesTerm |
CIDR block
ⓘ
address aggregation ⓘ provider-based addressing ⓘ routing prefix ⓘ supernet ⓘ |
| focusesOn |
IP address allocation
ⓘ
IP routing ⓘ route aggregation ⓘ routing scalability ⓘ |
| goal |
improve efficiency of IP address allocation
ⓘ
reduce size of global routing tables ⓘ support scalable Internet growth ⓘ |
| intendedAudience |
Internet service providers
ⓘ
network operators ⓘ protocol designers ⓘ |
| introducesConcept |
prefix-based routing
ⓘ
provider-based address allocation ⓘ route aggregation using supernets ⓘ |
| language | English ⓘ |
| obsoletedBy |
RFC 4632
ⓘ
RFC 4633 ⓘ |
| publishedBy |
Internet Engineering Task Force
ⓘ
surface form:
IETF
Internet Engineering Task Force ⓘ |
| relatedTo |
BGP route aggregation
ⓘ
IPv4 routing ⓘ RFC 4632 ⓘ RFC 4633 ⓘ |
| replaces | classful IP addressing model ⓘ |
| standardizes | CIDR notation for IP prefixes ⓘ |
| status | Obsoleted ⓘ |
| stream |
Internet Engineering Task Force
ⓘ
surface form:
IETF
|
| title |
Classless Inter-Domain Routing
ⓘ
surface form:
Classless Inter-Domain Routing (CIDR): an Address Assignment and Aggregation Strategy
|
| updates | IPv4 address allocation strategy ⓘ |
| usesNotation | slash notation for network prefixes ⓘ |
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 1519 Description of subject: RFC 1519 is the Internet Engineering Task Force (IETF) document that originally specified Classless Inter-Domain Routing (CIDR) for more efficient IP address allocation and routing on the Internet.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.