DSCP (DiffServ) is a mechanism for marking packets with QoS information. DSCP works at which layer of the OSI model?

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Multiple Choice

DSCP (DiffServ) is a mechanism for marking packets with QoS information. DSCP works at which layer of the OSI model?

DSCP marks packets in the IP header to indicate how they should be treated as they traverse the network. The IP header is part of the network layer, so DSCP operates at Layer 3. Routers and other network devices read the DSCP field to apply per-hop behaviors and prioritize traffic accordingly. This is distinct from Layer 2 QoS marks (like 802.1p) that exist in the data-link layer, or any Layer 4 or Layer 5 handling, which DSCP does not use.

DSCP marks packets in the IP header to indicate how they should be treated as they traverse the network. The IP header is part of the network layer, so DSCP operates at Layer 3. Routers and other network devices read the DSCP field to apply per-hop behaviors and prioritize traffic accordingly. This is distinct from Layer 2 QoS marks (like 802.1p) that exist in the data-link layer, or any Layer 4 or Layer 5 handling, which DSCP does not use.

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