The IP packet has a special field to mark the QoS. For example, the last 6 bits in the ToS field of an IPv4 packet mark the DSCP value.
The IP packet has a special field to mark the QoS. For example, the last 6 bits in the ToS field of an IPv4 packet mark the DSCP value.
The statement is true. The last 6 bits in the ToS (Type of Service) field of an IPv4 packet indeed mark the DSCP (Differentiated Services Code Point) value, which is used for QoS (Quality of Service) marking.
2 last bits are ECN. DSCP used first 6 bits.