Which two statements about the IPv4 ToS byte are true? (Choose two.)
A.
The ToS byte is located in the Layer 2 header.
B.
The ToS byte is located in the Layer 3 header.
C.
The DSCP values range from 0 to 7.
D.
The IP precedence and the DSCP fields have two overlapping bits.
E.
The class selector in the DSCP field is defined for backward compatibility with IP precedence.