Which QoS model uses the DSCP bits to mark packets and provides 64 possible classes of service?

Which QoS model uses the DSCP bits to mark packets and provides 64 possible classes of service?

• best-effort
• IntServ
• DiffServ
• FIFO

Explanation: The DiffServ model uses 6-bits known as the DiffServ Code Point (DSCP) bits to mark traffic and offers a maximum of 64 possible classes of service. Diffserv-aware routers can then implement per-hop behaviors (PHBs) that can control packet forwarding based on the specified class of service.

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