OSPF

E123434

interior gateway protocol link-state routing protocol routing protocol

OSPF (Open Shortest Path First) is a widely used interior gateway routing protocol that employs link-state information to determine the most efficient path for data within an IP network.

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All labels observed (5)

Label	Occurrences
OSPF canonical	9
OSPFv2	2
Open Shortest Path First	2
Dijkstra shortest path first	1
Link State PDU	1

How this entity was disambiguated

This entity first appeared as the object of triple T1077211 — 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: OSPF
Context triple: [OSPFv3, basedOn, OSPF]

A. OSPFv3
OSPFv3 is the version of the Open Shortest Path First routing protocol designed to operate over IPv6 networks, providing link-state routing and support for IPv6 addressing and features.
B. BGP
BGP (Border Gateway Protocol) is the primary inter-domain routing protocol used to exchange routing information and determine paths between autonomous systems on the global Internet.
C. BGP-4+
BGP-4+ is an enhanced version of the Border Gateway Protocol designed to support routing for IPv6 networks.
D. IS-IS for IPv6
IS-IS for IPv6 is an extension of the IS-IS interior gateway routing protocol that enables dynamic routing and topology discovery in IPv6 networks.
E. OSI protocol suite
The OSI protocol suite is a conceptual networking framework that defines a seven-layer model for how different communication protocols interact to enable data exchange across 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: OSPF
Target entity description: OSPF (Open Shortest Path First) is a widely used interior gateway routing protocol that employs link-state information to determine the most efficient path for data within an IP network.

A. OSPFv3
OSPFv3 is the version of the Open Shortest Path First routing protocol designed to operate over IPv6 networks, providing link-state routing and support for IPv6 addressing and features.
B. BGP
BGP (Border Gateway Protocol) is the primary inter-domain routing protocol used to exchange routing information and determine paths between autonomous systems on the global Internet.
C. BGP-4+
BGP-4+ is an enhanced version of the Border Gateway Protocol designed to support routing for IPv6 networks.
D. IS-IS for IPv6
IS-IS for IPv6 is an extension of the IS-IS interior gateway routing protocol that enables dynamic routing and topology discovery in IPv6 networks.
E. OSI protocol suite
The OSI protocol suite is a conceptual networking framework that defines a seven-layer model for how different communication protocols interact to enable data exchange across networks.
F. None of above. chosen

Statements (50)

Predicate	Object
instanceOf	interior gateway protocol ⓘ link-state routing protocol ⓘ routing protocol ⓘ
administrativeDistanceCisco	110 ⓘ
authenticationMethods	cryptographic authentication ⓘ null authentication ⓘ simple password ⓘ
backboneAreaID	0.0.0.0 ⓘ
convergenceType	fast ⓘ
definedInRFC	RFC 2328 ⓘ RFC 5340 ⓘ
designGoal	efficient shortest-path routing within an IP network ⓘ
fullName	OSPF self-linksurface differs ⓘ surface form: Open Shortest Path First
hasSpecialArea	backbone area ⓘ
IPProtocolNumber	89 ⓘ
IPv4Variant	OSPF self-linksurface differs ⓘ surface form: OSPFv2
IPv6Variant	OSPFv3 ⓘ
loopPreventionMethod	link-state database and SPF calculation ⓘ
metricType	cost ⓘ
operatesAtLayer	network layer ⓘ
replaces	RIP in many enterprise networks ⓘ
routerTypes	area border router (ABR) ⓘ autonomous system boundary router (ASBR) ⓘ backbone router ⓘ internal router ⓘ
routingDomainType	intra-domain ⓘ
scope	single autonomous system ⓘ
standardizedBy	Internet Engineering Task Force ⓘ surface form: IETF
supports	IPv4 ⓘ IPv6 ⓘ VLSM ⓘ classless inter-domain routing (CIDR) ⓘ
supportsAuthentication	yes ⓘ
supportsEqualCostMultipath	yes ⓘ
supportsHierarchicalRouting	yes ⓘ
supportsNSSA	yes ⓘ
supportsStubAreas	yes ⓘ
usesAlgorithm	Dijkstra ⓘ surface form: Dijkstra shortest path first algorithm
usesConcept	areas ⓘ autonomous system ⓘ
usesLSA	AS-external LSA ⓘ network LSA ⓘ router LSA ⓘ summary LSA ⓘ
usesMulticastAddress	224.0.0.5 ⓘ 224.0.0.6 ⓘ
usesNeighborDiscovery	hello protocol ⓘ
usesPort	no TCP or UDP port (protocol number 89) ⓘ
usesRoutingType	link-state ⓘ
usesTransportProtocol	IP ⓘ

How these facts were elicited

Referenced by (15)

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

OSPFv3 → basedOn → OSPF ⓘ

OSPFv3 → differsFrom → OSPF ⓘ

this entity surface form: OSPFv2

Internet architecture → usesProtocol → OSPF ⓘ

OSPF → fullName → OSPF self-linksurface differs ⓘ

this entity surface form: Open Shortest Path First

OSPF → IPv4Variant → OSPF self-linksurface differs ⓘ

this entity surface form: OSPFv2

ISO 10589 → definesConcept → OSPF ⓘ

this entity surface form: Link State PDU

ISO 10589 → relatedTo → OSPF ⓘ

RFC 1195 → relatedTo → OSPF ⓘ

RFC 5340 → updates → OSPF ⓘ

RFC 5340 → relatesTo → OSPF ⓘ

this entity surface form: Open Shortest Path First

Cisco Packet Tracer → supportsProtocol → OSPF ⓘ

Cisco Catalyst switches → supports → OSPF ⓘ

IS‑IS → usesAlgorithm → OSPF ⓘ

subject surface form: IS-IS

this entity surface form: Dijkstra shortest path first

IS‑IS → comparedWith → OSPF ⓘ

subject surface form: IS-IS

Cisco NX‑OS → supportsFeature → OSPF ⓘ

subject surface form: Cisco NX-OS

All labels observed (5)

How this entity was disambiguated Show

Statements (50)

How these facts were elicited Show

Referenced by (15)

How this entity was disambiguated

How these facts were elicited