Internet Protocol type of service field
E519654
The Internet Protocol type of service field is a header field in IP packets originally intended to indicate desired quality-of-service parameters such as delay, throughput, and reliability for network routing and handling decisions.
All labels observed (4)
| Label | Occurrences |
|---|---|
| Differentiated Services | 1 |
| Differentiated Services Code Point | 1 |
| Differentiated Services field | 1 |
| Internet Protocol type of service field canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5421627 — 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: Internet Protocol type of service field Context triple: [RFC 760, defines, Internet Protocol type of service field]
-
A.
RFC 2474
RFC 2474 is an IETF standard that defines the Differentiated Services (DiffServ) field in the IPv4 and IPv6 headers to support scalable quality-of-service (QoS) in IP networks.
-
B.
The Addition of Explicit Congestion Notification (ECN) to IP
The Addition of Explicit Congestion Notification (ECN) to IP is an IETF standard (RFC 3168) that specifies how IP and TCP can signal and respond to network congestion without relying solely on packet loss.
-
C.
Time-Sensitive Networking
Time-Sensitive Networking is a set of IEEE 802 Ethernet standards that enable deterministic, low-latency, and highly reliable communication for real-time applications such as industrial automation, automotive, and professional audio/video.
-
D.
Random Early Detection
Random Early Detection is a congestion avoidance mechanism for packet-switched networks that probabilistically drops packets before a queue becomes full to signal and control incipient congestion.
-
E.
QCI (QoS Class Identifier)
QCI (QoS Class Identifier) is a standardized LTE parameter that categorizes traffic into different quality-of-service classes, defining priorities, delay budgets, and packet loss characteristics for various services.
- 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: Internet Protocol type of service field Target entity description: The Internet Protocol type of service field is a header field in IP packets originally intended to indicate desired quality-of-service parameters such as delay, throughput, and reliability for network routing and handling decisions.
-
A.
RFC 2474
RFC 2474 is an IETF standard that defines the Differentiated Services (DiffServ) field in the IPv4 and IPv6 headers to support scalable quality-of-service (QoS) in IP networks.
-
B.
The Addition of Explicit Congestion Notification (ECN) to IP
The Addition of Explicit Congestion Notification (ECN) to IP is an IETF standard (RFC 3168) that specifies how IP and TCP can signal and respond to network congestion without relying solely on packet loss.
-
C.
Time-Sensitive Networking
Time-Sensitive Networking is a set of IEEE 802 Ethernet standards that enable deterministic, low-latency, and highly reliable communication for real-time applications such as industrial automation, automotive, and professional audio/video.
-
D.
Random Early Detection
Random Early Detection is a congestion avoidance mechanism for packet-switched networks that probabilistically drops packets before a queue becomes full to signal and control incipient congestion.
-
E.
QCI (QoS Class Identifier)
QCI (QoS Class Identifier) is a standardized LTE parameter that categorizes traffic into different quality-of-service classes, defining priorities, delay budgets, and packet loss characteristics for various services.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
IP header field
ⓘ
network protocol field ⓘ |
| appliesTo | IP packets ⓘ |
| associatedWithConcept |
priority routing
ⓘ
quality of service ⓘ traffic engineering ⓘ |
| category | Internet standard mechanism ⓘ |
| definedIn | RFC 791 ⓘ |
| hasAlternativeName |
TOS byte
ⓘ
ToS field ⓘ Type of Service field ⓘ |
| hasBitLength | 8 bits ⓘ |
| hasComponent |
cost bit
ⓘ
delay bit ⓘ precedence field ⓘ reliability bit ⓘ throughput bit ⓘ |
| hasScope | per-hop behavior indication ⓘ |
| historicalNote | many early networks ignored ToS semantics ⓘ |
| influences |
packet forwarding behavior
ⓘ
queuing decisions in routers ⓘ scheduling of packets ⓘ |
| introducedInProtocolVersion | IPv4 ⓘ |
| layer | network layer ⓘ |
| mappedTo |
Differentiated Services Code Point
ⓘ
linked to:
RFC 2474
Explicit Congestion Notification bits ⓘ |
| notPresentIn | original IPv6 header ⓘ |
| originalPurpose |
indicate cost preference
ⓘ
indicate delay preference ⓘ indicate desired quality of service ⓘ indicate reliability preference ⓘ indicate throughput preference ⓘ influence routing decisions ⓘ |
| OSIModelLayer | Layer 3 ⓘ |
| partOf | IPv4 header ⓘ |
| precedenceFieldBitLength | 3 bits ⓘ |
| protocolFamily | Internet Protocol ⓘ |
| protocolVersion | IPv4 only ⓘ |
| QoSSubfieldBitLength | 4 bits ⓘ |
| redefinedBy |
RFC 2474
ⓘ
RFC 3168 ⓘ |
| reservedBitLength | 1 bit ⓘ |
| status | largely deprecated in favor of DSCP ⓘ |
| supersededBy |
DS field
ⓘ
Differentiated Services field ⓘ |
| usedFor |
policy-based routing decisions
ⓘ
quality of service signaling ⓘ traffic prioritization ⓘ |
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: Internet Protocol type of service field Description of subject: The Internet Protocol type of service field is a header field in IP packets originally intended to indicate desired quality-of-service parameters such as delay, throughput, and reliability for network routing and handling decisions.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Internet Protocol type of service field