In an IEEE 802.3 Ethernet frame, what is the significance of the DSAP field?
A.
The DSAP field specifies the TCP or UDP port that is associated with the transport protocol.
B.
The DSAP field is only used on United States Department of Defense networks to indicate the
information classification level.
C.
The DSAP field is only used in Ethernet II frames.
D.
The DSAP field indicates the network layer protocol.
DSAP (Destination SAP) is an 8-bit long field that represents the logical addresses of the network layer entity intended to receive the message
Check!!! Wikipedia IEEE 802.2
https://en.wikipedia.org/wiki/IEEE_802.2#LSAP_Values
Yes, the LSAP values are not addresses of individual devices but addresses of the service – the table lists services like DoD or Texas Instruments.
Correct Answer: D.