By default, what value is voice traffic marked as on a Cisco Catalyst Switch?
A. DSCP CAS6 value 21, Cos 3
B. DSCP AF21 value 46, Cos 5
C. DSCP EF value 46, Cos 7
D. DSCP EF value 46, Cos 5
What value is voice traffic marked as on a Cisco Catalyst Switch?
I agree with Bob :
The EF model is used for voice over IP media traffic (RTP) by default in most vendors phones. Cisco IP Phones mark signaling packets (SCCP or SIP) to CS3 (24), while media (RTP) is marked to EF (DSCP 46) by default. All EF traffic is normally mapped to the priority queue (PQ) on Cisco switches and routers.
Yup, D is correct.
https://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/WAN_and_MAN/QoS_SRND/QoS-SRND-Book/QoSIntro.html