OSI physical layer
E58114
The OSI physical layer is the lowest layer of the OSI model, responsible for transmitting raw bits over a physical medium through electrical, optical, or radio signals and defining the hardware specifications for network connections.
All labels observed (4)
| Label | Occurrences |
|---|---|
| OSI physical layer canonical | 3 |
| Ethernet physical layer (PHY) | 1 |
| OSI Layer 1 | 1 |
| OSI layer 1 | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T463805 — 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: OSI physical layer Context triple: [IEEE 802.3bz 2.5G/5GBASE‑T Ethernet standard, layer, OSI physical layer]
-
A.
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.
-
B.
IEEE 802.3 Ethernet standard
The IEEE 802.3 Ethernet standard is the foundational specification that defines wired Ethernet networking technologies, including physical media, data link layer protocols, and methods for high-speed data transmission in local and metropolitan area networks.
-
C.
10BASE-T
10BASE-T is an early Ethernet standard that transmits data at 10 Mbps over twisted-pair copper cabling using a star topology.
-
D.
IEEE 802.18
IEEE 802.18 is the Radio Regulatory Technical Advisory Group within the IEEE 802 standards community that focuses on spectrum and regulatory issues affecting wireless LAN and MAN technologies.
-
E.
IEEE 802 family of standards
The IEEE 802 family of standards is a collection of networking specifications that define the physical and data link layers for local and metropolitan area networks, including widely used technologies such as Ethernet and Wi‑Fi.
- 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: OSI physical layer Target entity description: The OSI physical layer is the lowest layer of the OSI model, responsible for transmitting raw bits over a physical medium through electrical, optical, or radio signals and defining the hardware specifications for network connections.
-
A.
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.
-
B.
IEEE 802.3 Ethernet standard
The IEEE 802.3 Ethernet standard is the foundational specification that defines wired Ethernet networking technologies, including physical media, data link layer protocols, and methods for high-speed data transmission in local and metropolitan area networks.
-
C.
10BASE-T
10BASE-T is an early Ethernet standard that transmits data at 10 Mbps over twisted-pair copper cabling using a star topology.
-
D.
IEEE 802.18
IEEE 802.18 is the Radio Regulatory Technical Advisory Group within the IEEE 802 standards community that focuses on spectrum and regulatory issues affecting wireless LAN and MAN technologies.
-
E.
IEEE 802 family of standards
The IEEE 802 family of standards is a collection of networking specifications that define the physical and data link layers for local and metropolitan area networks, including widely used technologies such as Ethernet and Wi‑Fi.
- F. None of above. chosen
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
OSI model layer
ⓘ
networking concept ⓘ |
| abstractionLevel | hardware-oriented ⓘ |
| closelyRelatedTo | data link layer ⓘ |
| concerns |
physical media such as copper cables
ⓘ
physical media such as fiber optic cables ⓘ physical media such as wireless channels ⓘ |
| dataUnit | bit ⓘ |
| defines |
bit timing
ⓘ
cable types ⓘ connector types ⓘ data rate (bandwidth) on the medium ⓘ electrical characteristics of signals ⓘ line coding schemes ⓘ maximum cable lengths ⓘ mechanical characteristics of interfaces ⓘ modulation schemes ⓘ optical characteristics of signals ⓘ physical media specifications ⓘ physical topology aspects ⓘ pin layouts ⓘ procedural characteristics for physical connection ⓘ radio frequency characteristics of signals ⓘ signal voltage levels ⓘ |
| doesNotHandle |
application-level data formats
ⓘ
encryption ⓘ error recovery ⓘ flow control ⓘ routing ⓘ |
| examplesInclude |
DSL physical layer standards
ⓘ
Ethernet physical layer standards ⓘ Wi‑Fi radio interface ⓘ fiber optic physical standards ⓘ |
| goal | reliable transmission of raw bitstream over physical medium ⓘ |
| handles | bit-level transmission ⓘ |
| layerNumber | 1 ⓘ |
| partOf |
OSI protocol suite
ⓘ
surface form:
OSI model
|
| positionInModel | lowest layer ⓘ |
| primaryFunction | transmission of raw bits over a physical medium ⓘ |
| providesServiceTo | data link layer ⓘ |
| responsibleFor |
activating physical connections
ⓘ
bit synchronization ⓘ deactivating physical connections ⓘ maintaining physical connections ⓘ physical layer encoding ⓘ transmission of bits as electrical signals ⓘ transmission of bits as optical signals ⓘ transmission of bits as radio signals ⓘ |
| standardizedBy |
International Organization for Standardization
ⓘ
surface form:
ISO
ITU Telecommunication Standardization Sector ⓘ
surface form:
ITU-T
|
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: OSI physical layer Description of subject: The OSI physical layer is the lowest layer of the OSI model, responsible for transmitting raw bits over a physical medium through electrical, optical, or radio signals and defining the hardware specifications for network connections.
Referenced by (6)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Ethernet physical layer (PHY)
this entity surface form:
OSI Layer 1
subject surface form:
Synchronous Ethernet
this entity surface form:
OSI layer 1