SSAP
E406984
SSAP (Source Service Access Point) is a field in IEEE 802.2 LLC headers that identifies the logical source endpoint of a network service access point for data link layer communications.
All labels observed (1)
| Label | Occurrences |
|---|---|
| SSAP canonical | 1 |
Statements (41)
| Predicate | Object |
|---|---|
| instanceOf |
IEEE 802.2 LLC field
ⓘ
data link layer protocol element ⓘ |
| addressSpace | 0–255 decimal values ⓘ |
| appearsIn | LLC PDU header ⓘ |
| belongsToModel |
OSI protocol suite
ⓘ
surface form:
OSI model
|
| bitLength | 8 bits ⓘ |
| commandResponseBitPosition | least significant bit ⓘ |
| communicationContext |
LAN
ⓘ
MAN ⓘ WLAN ⓘ |
| definedInStandard | IEEE 802.2 ⓘ |
| direction | source ⓘ |
| encodes | source service access point identifier ⓘ |
| fieldType | address field ⓘ |
| fullName | Source Service Access Point ⓘ |
| hasBitStructure | 7-bit SAP value plus 1-bit command/response indicator ⓘ |
| headerFieldOf | IEEE 802.2 LLC header ⓘ |
| layer | data link layer ⓘ |
| notToBeConfusedWith | Session layer SAP ⓘ |
| osiLayer | Layer 2 ⓘ |
| pairedWith | DSAP ⓘ |
| partOf |
IEEE 802.2
ⓘ
surface form:
IEEE 802.2 Logical Link Control
|
| positionRelativeTo | follows MAC header in LLC frame ⓘ |
| relatedConcept |
DSAP
ⓘ
LLC ⓘ Service Access Point ⓘ |
| role |
identifies logical source endpoint of a service access point
ⓘ
identifies source network service access point ⓘ |
| scope | link-local ⓘ |
| standardizationBody |
Institute of Electrical and Electronics Engineers
ⓘ
surface form:
IEEE
|
| supports |
connection-oriented LLC services
ⓘ
connectionless LLC services ⓘ |
| usedBy | LLC sublayer ⓘ |
| usedFor |
data link layer multiplexing
ⓘ
distinguishing multiple protocols over same MAC ⓘ |
| usedIn |
802.11 LLC frames
ⓘ
Ethernet LLC frames ⓘ IEEE 802 family of standards ⓘ
surface form:
IEEE 802 LANs
|
| usedToSelect | upper-layer protocol at source endpoint ⓘ |
| valueType | unsigned integer ⓘ |
| worksWith | MAC sublayer ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.