Cisco Networks: Engineers' Handbook of Routing, Switching, and Security with IOS, NX-OS, and ASA

© Chris Carthern and William Wilson and Noel Rivera 2021

C. Carthern et al.Cisco Networkshttps://doi.org/10.1007/978-1-4842-6672-4_15

15. QoS

Chris Carthern¹  , William Wilson² and Noel Rivera³

(1)

Bangkok, Krung Thep, Thailand

(2)

FPO, AP, USA

(3)

APO, AE, USA

 

Intro to QoS

The objective of this chapter is to discuss the practical implementation and testing of QoS policies at an introductory level. For an in-depth discussion, I suggest Cisco QoS Exam Certification Guide, Second Edition, by Cisco Press. With that being said, let us begin. Why is QoS needed? QoS is needed for delay-sensitive traffic such as video, voice, and real-time applications to allow network devices along the path to give a given type of traffic priority in processing and forwarding. ...