Which two items are examples of QoS traffic descriptors? (Choose two.)

DSCP (Differentiated Services Code Point) and MPLS EXP bits are both examples of QoS traffic descriptors. DSCP is a 6-bit field in the IP header that marks packets for differentiated treatment, indicating the per-hop behavior (PHB) a router should apply. MPLS EXP bits (now commonly referred to as Traffic Class or TC bits) are a 3-bit field in the MPLS header used to carry QoS information across an MPLS network, often mapping directly to DSCP values. Packet size and bandwidth are characteristics of traffic or network capabilities, not direct descriptors within a packet header used for QoS marking. ToS (Type of Service) is the byte within the IPv4 header that contains the DSCP field; DSCP is the more granular and commonly used QoS descriptor today.