Cisco Cisco Aironet 350 Mini-PCI Wireless LAN Client Adapter Guia Do Desenho

This chapter describes quality-of-service (QoS) in the context of WLAN implementations. This chapter 
describes WLAN QoS in general, but does not provide in-depth coverage on topics such as security, 
segmentation, and voice over WLAN (VoWLAN), although these topics have a QoS component. This 
chapter also provides information on the features of the Cisco Centralized WLAN Architecture.

This chapter is intended for those who are tasked with designing and implementing enterprise WLAN 
deployments using the Cisco Unified Wireless technology. 

QoS refers to the capability of a network to provide differentiated service to selected network traffic over 
various network technologies. QoS technologies provide the following benefits: 

Provide building blocks for business multimedia and voice applications used in campus, WAN, and 
service provider networks 

Allow network managers to establish service-level agreements (SLAs) with network users 

Enable network resources to be shared more efficiently and expedite the handling of mission-critical 
applications 

Manage time-sensitive multimedia and voice application traffic to ensure that this traffic receives 
higher priority, greater bandwidth, and less delay than best-effort data traffic

With QoS, bandwidth can be managed more efficiently across LANs, including WLANs and WANs. QoS 
provides enhanced and reliable network service by doing the following: 

Supporting dedicated bandwidth for critical users and applications 

Controlling jitter and latency (required by real-time traffic) 

Managing and minimizing network congestion 

Shaping network traffic to smooth the traffic flow 

Setting network traffic priorities