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Network Sales and Services Handbook by Matthew J. Castelli

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Chapter 13. Quality of Service Introduction

This chapter covers the following topics.

  • ATM

  • Frame Relay

  • Internet Protocol

  • MPLS and MPLS-TE

  • DiffServ

Quality of service (QoS) refers to the capability of a network to provide better service to selected network traffic over various networking technologies. Network service providers (NSPs) implement QoS in customer wide-area networking (WAN) technologies, such as Asynchronous Transfer Mode (ATM), Frame Relay, IP/IP-VPN (IP-based Virtual Private Networks), and MPLS, which can use any of these underlying technologies. The primary goal of QoS is to provide priority to customer traffic across a network by dedicating bandwidth, controlling jitter and latency (required by some real-time and interactive traffic), ...

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