Drag and drop each DSCP value on the left to its matching Per-Hop Behavior (PHB) on the right.
Drag a concept onto its matching description — or click a concept then click the description.
Expedited Forwarding
Assured Forwarding class 4, low drop probability
Class Selector 3
Assured Forwarding class 2, medium drop probability
Best-effort
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
DSCP values map to specific PHBs: EF is for expedited forwarding, AF41 is Assured Forwarding class 4 low drop, CS3 is class selector 3, AF21 is Assured Forwarding class 2 medium drop, and BE (0) is best-effort.
Quick reference
| Storage Class | Min Duration | Retrieval | Use Case |
|---|---|---|---|
| S3 Standard | None | Immediate | Frequently accessed data |
| S3 Standard-IA | 30 days | Immediate | Infrequent access, rapid retrieval |
| S3 One Zone-IA | 30 days | Immediate | Non-critical infrequent data |
| S3 Intelligent-Tiering | None | Immediate–hours | Unknown or changing access patterns |
| S3 Glacier Instant | 90 days | Milliseconds | Archive with instant retrieval |
| S3 Glacier Flexible | 90 days | Minutes–hours | Archive, flexible retrieval |
| S3 Glacier Deep Archive | 180 days | Hours | Long-term compliance archive |
Go deeper
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Variation 1. Drag and drop each DSCP value on the left to its matching Per-Hop Behavior (PHB) on the right.
mediumWhy P1: DSCP 46 maps to EF (Expedited Forwarding), DSCP 10 maps to AF11 (Assured Forwarding class 1 low drop), DSCP 18 maps to AF21 (Assured Forwarding class 2 low drop), DSCP 26 maps to AF31 (Assured Forwarding class 3 low drop), DSCP 34 maps to AF41 (Assured Forwarding class 4 low drop).
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.