CCDE: Cisco Certified Design Expert (Practical) — Question 219

When classifying and marking traffic, a recommended design principle is to classify and mark applications as close to their sources as technically and administratively feasible. As the line between enterprises and service providers continues to blur, what ensures interoperability and future expansion?

Answer options

• A. each application class to its own dedicated queue
• B. QoS policies in hardware rather than software
• C. standards-based DSCP PHB markings
• D. police traffic flows as close to their source as possible

Correct answer: C

Explanation

The correct answer, C, highlights the importance of using standards-based DSCP PHB markings for ensuring interoperability across different systems and services. Options A and D focus more on traffic management rather than interoperability, while B suggests a hardware-based approach that may not address future expansions as effectively as standards-based methods.