Classless Inter-Domain Routing

E125147

IP addressing scheme routing methodology

Classless Inter-Domain Routing (CIDR) is an IP addressing and routing scheme that replaces traditional class-based networks to enable more efficient allocation of IP address space and improved route aggregation on the internet.

Try in SPARQL Jump to: Surface forms Disambiguation Statements Elicitation Referenced by

All labels observed (3)

Label	Occurrences
CIDR	2
Classless Inter-Domain Routing canonical	1
Classless Inter-Domain Routing (CIDR): an Address Assignment and Aggregation Strategy	1

How this entity was disambiguated

This entity first appeared as the object of triple T1081725 — 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: Classless Inter-Domain Routing
Context triple: [BGP-4+, supports, Classless Inter-Domain Routing]

A. RFC 3410
RFC 3410 is an informational RFC that provides an overview, framework, and goals for the Simple Network Management Protocol version 3 (SNMPv3) and its related specifications.
B. Internet Protocol version 6
Internet Protocol version 6 (IPv6) is the modern Internet addressing and routing protocol designed to replace IPv4 by providing a vastly larger address space and improved network efficiency and security features.
C. IEEE 802.1D MAC bridging standard
The IEEE 802.1D MAC bridging standard is a networking specification that defines how Ethernet bridges and switches forward frames and prevent loops in local area networks, including the original Spanning Tree Protocol.
D. RFC 3413
RFC 3413 is an Internet standard that specifies the Simple Network Management Protocol (SNMPv3) applications, including notification, proxy, and command generator/receiver functions used for network management.
E. BGP-4+
BGP-4+ is an enhanced version of the Border Gateway Protocol designed to support routing for IPv6 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: Classless Inter-Domain Routing
Target entity description: Classless Inter-Domain Routing (CIDR) is an IP addressing and routing scheme that replaces traditional class-based networks to enable more efficient allocation of IP address space and improved route aggregation on the internet.

A. RFC 3410
RFC 3410 is an informational RFC that provides an overview, framework, and goals for the Simple Network Management Protocol version 3 (SNMPv3) and its related specifications.
B. Internet Protocol version 6
Internet Protocol version 6 (IPv6) is the modern Internet addressing and routing protocol designed to replace IPv4 by providing a vastly larger address space and improved network efficiency and security features.
C. IEEE 802.1D MAC bridging standard
The IEEE 802.1D MAC bridging standard is a networking specification that defines how Ethernet bridges and switches forward frames and prevent loops in local area networks, including the original Spanning Tree Protocol.
D. RFC 3413
RFC 3413 is an Internet standard that specifies the Simple Network Management Protocol (SNMPv3) applications, including notification, proxy, and command generator/receiver functions used for network management.
E. BGP-4+
BGP-4+ is an enhanced version of the Border Gateway Protocol designed to support routing for IPv6 networks.
F. None of above. chosen

Statements (49)

Predicate	Object
instanceOf	IP addressing scheme ⓘ routing methodology ⓘ
abbreviation	Classless Inter-Domain Routing self-linksurface differs ⓘ surface form: CIDR
addressFormat	IP address slash prefix-length ⓘ
affects	global BGP routing table ⓘ
alsoKnownAs	supernetting ⓘ
appliesTo	IPv4 ⓘ IPv6 ⓘ
benefit	improves scalability of internet routing ⓘ slows IPv4 address exhaustion ⓘ supports hierarchical addressing ⓘ
category	Internet standard ⓘ network layer concept ⓘ
componentOf	modern internet architecture ⓘ
contrastsWith	class A network ⓘ class B network ⓘ class C network ⓘ
definedIn	RFC 1519 ⓘ
enables	fine-grained subnetting ⓘ more efficient IP address utilization ⓘ reduction of global routing table size ⓘ route summarization ⓘ
examplePrefixLength	/16 ⓘ /24 ⓘ /32 ⓘ
introducedBy	Internet Engineering Task Force ⓘ
introducedIn	1993 ⓘ
keyConcept	prefix length notation ⓘ variable-length subnet masking ⓘ
notationExample	10.0.0.0/8 ⓘ 192.168.0.0/16 ⓘ 2001:db8::/32 ⓘ
relatedConcept	border gateway protocol ⓘ default route ⓘ routing table ⓘ subnet mask ⓘ
relatedRFC	RFC 4632 ⓘ
replaces	class-based networks ⓘ classful IP addressing ⓘ
standardizedBy	Internet Engineering Task Force ⓘ surface form: IETF
supports	aggregation of contiguous IP address blocks ⓘ
usedBy	backbone routers ⓘ enterprise networks ⓘ internet service providers ⓘ
usedFor	IP address allocation ⓘ internet routing ⓘ route aggregation ⓘ
uses	network prefix ⓘ prefix length ⓘ

How these facts were elicited

Referenced by (4)

Full triples — surface form annotated when it differs from this entity's canonical label.

BGP-4+ → supports → Classless Inter-Domain Routing ⓘ

Classless Inter-Domain Routing → abbreviation → Classless Inter-Domain Routing self-linksurface differs ⓘ

this entity surface form: CIDR

RFC 1519 → title → Classless Inter-Domain Routing ⓘ

this entity surface form: Classless Inter-Domain Routing (CIDR): an Address Assignment and Aggregation Strategy

RFC 1519 → definesAbbreviation → Classless Inter-Domain Routing ⓘ