IEEE 802.1ad
E164040
IEEE 802.1ad is an Ethernet networking standard that extends VLAN tagging (often called Q-in-Q) to support scalable, provider-based virtual LAN services in metropolitan and carrier networks.
All labels observed (3)
| Label | Occurrences |
|---|---|
| IEEE 802.1ad canonical | 3 |
| IEEE 802.1ad-2005 | 1 |
| IEEE Standard 802.1ad | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1404965 — 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: IEEE 802.1ad Context triple: [Provider Bridging, standardizedIn, IEEE 802.1ad]
-
A.
IEEE 802.1Qfa
IEEE 802.1Qfa is an amendment to the IEEE 802.1Q standard that specifies enhancements for deterministic, time-sensitive networking in bridged Ethernet networks.
-
B.
IEEE 802.1Qfe
IEEE 802.1Qfe is a specific amendment within the IEEE 802.1 family that defines enhancements to Ethernet bridging and related network management functions.
-
C.
IEEE 802.1Qfg
IEEE 802.1Qfg is an Ethernet networking standard within the IEEE 802.1 family that defines mechanisms for enhanced reliability and fault tolerance in bridged networks.
-
D.
IEEE 802.1Qfc
IEEE 802.1Qfc is an amendment to the IEEE 802.1Q standard that specifies enhancements for frame preemption and traffic scheduling in Time-Sensitive Networking (TSN) Ethernet networks.
-
E.
IEEE 802.1Qel
IEEE 802.1Qel is an Ethernet networking standard that defines enhancements for scheduled traffic and latency management in time-sensitive 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: IEEE 802.1ad Target entity description: IEEE 802.1ad is an Ethernet networking standard that extends VLAN tagging (often called Q-in-Q) to support scalable, provider-based virtual LAN services in metropolitan and carrier networks.
-
A.
IEEE 802.1Qfa
IEEE 802.1Qfa is an amendment to the IEEE 802.1Q standard that specifies enhancements for deterministic, time-sensitive networking in bridged Ethernet networks.
-
B.
IEEE 802.1Qfe
IEEE 802.1Qfe is a specific amendment within the IEEE 802.1 family that defines enhancements to Ethernet bridging and related network management functions.
-
C.
IEEE 802.1Qfg
IEEE 802.1Qfg is an Ethernet networking standard within the IEEE 802.1 family that defines mechanisms for enhanced reliability and fault tolerance in bridged networks.
-
D.
IEEE 802.1Qfc
IEEE 802.1Qfc is an amendment to the IEEE 802.1Q standard that specifies enhancements for frame preemption and traffic scheduling in Time-Sensitive Networking (TSN) Ethernet networks.
-
E.
IEEE 802.1Qel
IEEE 802.1Qel is an Ethernet networking standard that defines enhancements for scheduled traffic and latency management in time-sensitive networks.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
Ethernet standard
ⓘ
IEEE 802.1 standard ⓘ networking standard ⓘ |
| alsoKnownAs |
Provider Bridging
ⓘ
surface form:
Provider Bridges
Q-in-Q ⓘ Stacked VLANs ⓘ |
| appliesTo |
Ethernet
ⓘ
Layer 2 networks ⓘ |
| benefit |
allows multiple customer VLANs over a single provider VLAN
ⓘ
improves VLAN scalability beyond 4094 VLAN limit ⓘ separates customer and provider VLAN spaces ⓘ supports VPN-like Ethernet services ⓘ supports transparent LAN services ⓘ |
| definesMechanism |
Q-in-Q tagging
ⓘ
VLAN stacking ⓘ provider bridging ⓘ |
| encapsulationModel | outer S-VLAN tag plus inner C-VLAN tag ⓘ |
| extendsStandard |
IEEE 802.1Q series
ⓘ
surface form:
IEEE 802.1Q
|
| fullName |
IEEE 802.1ad
self-linksurface differs
ⓘ
surface form:
IEEE Standard 802.1ad
|
| introducesConcept |
Customer VLAN (C-VLAN)
ⓘ
Service VLAN (S-VLAN) ⓘ |
| introducesField | S-TAG ⓘ |
| layer | data link layer ⓘ |
| maintainedBy |
Institute of Electrical and Electronics Engineers
ⓘ
surface form:
IEEE
IEEE 802.1 Working Group ⓘ |
| OSIlayer | Layer 2 ⓘ |
| primaryPurpose |
enable carrier-class Ethernet services
ⓘ
extend VLAN identifier space ⓘ support scalable provider-based VLAN services ⓘ |
| relatedStandard |
IEEE 802.1Q series
ⓘ
surface form:
IEEE 802.1Q
IEEE 802.1ag ⓘ IEEE 802.1ah ⓘ |
| status | incorporated into IEEE 802.1Q ⓘ |
| supports |
customer VLAN tags
ⓘ
service provider VLAN tags ⓘ |
| supportsOperation |
double VLAN tagging
ⓘ
tag stacking ⓘ |
| tagType |
802.1ad service tag
ⓘ
outer VLAN tag ⓘ |
| trafficSeparation |
per-customer VLAN separation
ⓘ
per-service VLAN separation ⓘ |
| useCase |
carrier Ethernet networks
ⓘ
metropolitan area networks ⓘ service provider networks ⓘ |
| usedFor |
carrier Ethernet VLAN aggregation
ⓘ
multi-tenant VLAN separation ⓘ wholesale Ethernet services ⓘ |
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: IEEE 802.1ad Description of subject: IEEE 802.1ad is an Ethernet networking standard that extends VLAN tagging (often called Q-in-Q) to support scalable, provider-based virtual LAN services in metropolitan and carrier networks.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
IEEE 802.1ad-2005
this entity surface form:
IEEE Standard 802.1ad