Which IEEE protocol provides bandwidth management and priority selection?
A.
Priority-based Flow Control (802.1Qbb)
B.
Enhanced Transmission Selection (802.1Qaz)
C.
Bandwidth Demand Circuit (802.1Qax)
D.
Quantized Congestion Control (802.1Qau)
E.
Data Center Bridging Exchange (802.1Qab)
B is correct.
Enhanced Transmission Selection (ETS): The IEEE 802.1Qaz standard provides bandwidth management and priority selection.
DCICT Student Guide
Enhanced Transmission Selection (ETS, IEEE 802.1Qaz) formalizes basic functionality that most switching vendors have been providing for years. ETS defines priority groups to which various frames can be assigned based on their priority and how to allocate bandwidth to those priority groups as a percentage of the maximum bandwidth available on the link.
http://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/Data_Center/UF_FCoE_final.html
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