Which three descriptions are true? (Choose three.)
A.
The class of service is a parameter that is used for traffic classification and marking at Layer 2.
B.
The IP precedence is a parameter that is used for traffic classification and marking at Layer 2.
C.
The differentiated services code point is a parameter that is used for traffic classification and marking
at Layer 2.
D.
The class of service is a parameter that is used for traffic classification and marking at Layer 3.
E.
The IP precedence is a parameter that is used for traffic classification and marking at Layer 3.
F.
The differentiated services code point is a parameter that is used for traffic classification and marking
at Layer 3.