CoS is applied for Layer 2 markings in an Ethernet environment. Which protocol must be configured on the Layer 2 switch port for CoS to work?
A.
MPLS
B.
IEEE 802.1W
C.
IEEE 802.1Q
D.
IEEE 802.1S
Explanation:
RSTP (IEEE 802.1w)
802.1S – Multiple Spanning Trees
IEEE 802.1Q (sometimes referred to as 1Q or DOT1Q) is a industry standards based implementation of carring traffic for multiple VLANs on a single trunking
interface between two Ethernet switches.