Drag and drop each DSCP PHB on the left to its matching queue treatment on the right.
Drag a concept onto its matching description — or click a concept then click the description.
Expedited forwarding, strict priority queuing, low delay and jitter
Assured forwarding, four classes with three drop probabilities per class
Class selector, backward compatible with IP precedence, simple priority queuing
Best-effort, default queue, no guarantees
Default forwarding, same as best-effort (DSCP 0)
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
EF: Expedited forwarding, strict priority queuing, low delay and jitter
EF PHB (DSCP 46) is for low-loss, low-latency traffic; AF PHBs (AF1x-AF4x) provide assured forwarding with four classes and three drop precedences; CS PHBs (CS1-CS7) are backward-compatible with IP precedence; BE (DSCP 0) is best-effort; DF (DSCP 0) is the default PHB.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 350-401 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 350-401 exam.