X.25
E93647
X.25 is an early ITU-T packet-switched network protocol standard widely used for WAN communication before the rise of modern IP-based networks.
All labels observed (1)
| Label | Occurrences |
|---|---|
| X.25 canonical | 4 |
How this entity was disambiguated
This entity first appeared as the object of triple T793513 — 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: X.25 Context triple: [ITU Telecommunication Standardization Sector, notableStandard, X.25]
-
A.
IEEE 802.5
IEEE 802.5 is a networking standard that defines the token ring local area network (LAN) protocol and its associated physical and data link layer specifications.
-
B.
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.
-
C.
IEEE 802.2
IEEE 802.2 is a legacy IEEE networking standard that defines the Logical Link Control (LLC) sublayer of the data link layer for local and metropolitan area networks.
-
D.
NSFNET
NSFNET was a high-speed, federally funded backbone network that expanded and commercialized the early internet across U.S. research and educational institutions.
-
E.
10BASE5
10BASE5 is the original thick coaxial Ethernet standard that operated at 10 Mbps over relatively long cable runs and formed the basis of early wired local area 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: X.25 Target entity description: X.25 is an early ITU-T packet-switched network protocol standard widely used for WAN communication before the rise of modern IP-based networks.
-
A.
IEEE 802.5
IEEE 802.5 is a networking standard that defines the token ring local area network (LAN) protocol and its associated physical and data link layer specifications.
-
B.
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.
-
C.
IEEE 802.2
IEEE 802.2 is a legacy IEEE networking standard that defines the Logical Link Control (LLC) sublayer of the data link layer for local and metropolitan area networks.
-
D.
NSFNET
NSFNET was a high-speed, federally funded backbone network that expanded and commercialized the early internet across U.S. research and educational institutions.
-
E.
10BASE5
10BASE5 is the original thick coaxial Ethernet standard that operated at 10 Mbps over relatively long cable runs and formed the basis of early wired local area networks.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
ITU-T recommendation
ⓘ
packet-switched network protocol ⓘ wide area network protocol ⓘ |
| category |
network layer protocol
ⓘ
telecommunications standard ⓘ |
| definesInterfaceBetween |
data circuit-terminating equipment
ⓘ
data terminal equipment ⓘ |
| hasAddressingScheme | X.121 ⓘ |
| hasLayer |
link layer
ⓘ
packet layer ⓘ physical layer ⓘ |
| influenced |
ATM
ⓘ
Frame Relay ⓘ early IP over X.25 deployments ⓘ |
| introducedIn | 1970s ⓘ |
| operatesOver |
ISDN
ⓘ
circuit-switched networks ⓘ leased lines ⓘ |
| provides |
connection-oriented service
ⓘ
reliable packet delivery ⓘ |
| replacedBy |
Frame Relay
ⓘ
MPLS ⓘ TCP/IP ⓘ |
| standardizedBy |
CCITT
ⓘ
ITU-T ⓘ
linked to:
ITU Telecommunication Standardization Sector
|
| status | largely obsolete ⓘ |
| stillUsedIn | some legacy systems ⓘ |
| supports |
error correction
ⓘ
flow control ⓘ link-level retransmission ⓘ permanent virtual circuits ⓘ switched virtual circuits ⓘ virtual circuits ⓘ |
| usedBefore | widespread adoption of IP ⓘ |
| usedFor |
host-to-host communication
ⓘ
packet-switched WAN communication ⓘ public data network access ⓘ terminal-to-host communication ⓘ |
| usedIn |
airline reservation systems
ⓘ
financial transaction networks ⓘ legacy point-of-sale networks ⓘ public data networks ⓘ |
| usesLinkLayer | LAPB ⓘ |
| usesPacketLayer | PLP ⓘ |
| usesPhysicalLayer |
EIA-232
ⓘ
EIA-449 ⓘ X.21 ⓘ |
| widelyDeployedIn |
1980s
ⓘ
1990s ⓘ |
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: X.25 Description of subject: X.25 is an early ITU-T packet-switched network protocol standard widely used for WAN communication before the rise of modern IP-based networks.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.