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Zorluk: KolayQoS Per-Hop Behaviors, Classification, Marking, Queuing, and Traffic Shaping/Policing

Match each Quality of Service (QoS) concept on the left with its corresponding operational description on the right.

  • Expedited Forwarding (EF)Provides low latency and guaranteed bandwidth for time-sensitive traffic using DSCP 46 (101110).
  • Class-Based Weighted Fair Queuing (CBWFQ)Allocates minimum bandwidth guarantees to specific traffic classes without a strict priority queue.
  • Low Latency Queuing (LLQ)Combines bandwidth guarantees with a strict priority queue dedicated to real-time voice traffic.
  • Trust BoundaryDefines the point in the network where incoming QoS markings are validated or re-marked.

Cevap

Expedited Forwarding (EF) matches with the description for low latency voice traffic using DSCP 46. Class-Based Weighted Fair Queuing (CBWFQ) matches with minimum bandwidth guarantees per class without a strict priority queue. Low Latency Queuing (LLQ) matches with bandwidth guarantees combined with a strict priority queue. Trust Boundary matches with the network location where QoS markings are validated or re-marked.
Each QoS term correctly aligns with its architectural definition: EF delivers low-latency PHB (DSCP 46); CBWFQ guarantees bandwidth allocations per class; LLQ incorporates a strict priority queue alongside CBWFQ; and the Trust Boundary dictates where packet QoS fields are evaluated and trusted.

Adım Adım Çözüm

1
Identify the primary function of Expedited Forwarding (EF).
EF uses DSCP 46 (101110) to deliver a low-loss, low-latency, low-jitter service ideal for voice.
Understanding PHB standards is fundamental for matching traffic types to QoS markings.
2
Differentiate between CBWFQ and LLQ queuing algorithms.
CBWFQ provides class-based bandwidth guarantees. LLQ builds on CBWFQ by adding a strict priority queue to service real-time traffic first.
Real-time voice traffic requires a strict priority queue provided by LLQ to minimize jitter.
3
Determine the role of a Trust Boundary in enterprise QoS deployments.
It defines the device or port threshold where packet markings are either accepted as trusted or re-marked to default values.
Enforcing trust boundaries prevents end-user devices from inappropriately elevating their traffic priority.

Anahtar Kavram

QoS Per-Hop Behaviors, Queuing Mechanisms (CBWFQ vs LLQ), and Trust Boundary Architecture
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Konular

QoS Per-Hop Behaviors, Classification, Marking, Queuing, and Traffic Shaping/Policing

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