Introduction
簡介
Imagine you are working as a network engineer for a global multimedia company. Your colleagues, Rachel and Tom, have submitted tickets related to network performance issues. Rachel is responsible for ensuring that VoIP calls have minimal delay and high-quality audio. Tom needs to manage the network bandwidth to prioritize video conferencing over less critical traffic to maintain smooth communication between international offices.
假設你是一家全球多媒體公司的網路工程師。你的同事 Rachel 與 Tom 分別提交了與網路效能問題相關的工單。Rachel 負責確保 VoIP 通話的延遲最低、音質最佳；Tom 則需要管理網路頻寬，讓視訊會議的優先順序高於較不重要的流量，以維持國際各辦公室之間的順暢溝通。
You realize that:
你了解到：
- Network traffic from business-critical and delay-sensitive applications like VoIP and video conferencing must be prioritized to ensure smooth and reliable performance.來自 VoIP 與視訊會議等業務關鍵且對延遲敏感的應用程式流量，必須優先處理，以確保效能順暢可靠。
- As user applications drive network growth and evolution, the demand to support various types of traffic increases.隨著使用者應用程式驅動網路的成長與演進，支援各種流量類型的需求也隨之增加。
- Providing secure, predictable, measurable, and guaranteed services requires implementing Quality of Service (QoS) mechanisms.要提供安全、可預測、可量測且有保證的服務，就必須實作服務品質（Quality of Service，QoS）機制。
Implementing QoS mechanisms requires careful planning, configuration, and monitoring to ensure they effectively meet the requirements of the network and its users while optimizing resource utilization.
實作 QoS 機制需要審慎規劃、設定與監控，才能有效滿足網路與使用者的需求，同時最佳化資源運用。
 | How can you ensure that VoIP calls and video conferencing receive the necessary priority to maintain high-quality performance while managing other types of network traffic? 你要如何確保 VoIP 通話與視訊會議獲得必要的優先權，以維持高品質效能，同時管理其他類型的網路流量？ |
To address these concerns, network engineers need to design and implement QoS policies to manage bandwidth provisioning, delay, jitter, and packet loss across the network. QoS mechanisms can classify and prioritize traffic, manage congestion, and ensure predictable and overall enhanced network performance.
為了解決這些問題，網路工程師需要設計並實作 QoS 政策，以管理頻寬配置、延遲、抖動與封包遺失。QoS 機制可以對流量進行分類與優先排序、管理壅塞，並確保網路效能可預測且整體提升。
In this course, you will learn to:
在本課程中，你將學會：
- Identify common causes of QoS issues on converged networks.找出匯聚網路上 QoS 問題的常見成因。
- Describe mechanisms that are used to deploy QoS.說明用於部署 QoS 的機制。
- Describe models for providing QoS on a network.說明在網路上提供 QoS 的模型。
Prioritizing critical traffic types by bandwidth allocation ensures high performance and reliability for video and audio applications, while still accommodating less critical data transmission.
透過頻寬配置優先處理關鍵流量類型，可確保視訊與音訊應用程式的高效能與可靠性，同時仍能容納較不重要的資料傳輸。