What is the definition of QoS?

A) The process by which network resources are controlled to implement a given policy for a given user

B) A set of rules specifying the user plane services and functions available to a particular user, supplied by the network

C) A value assigned to specific packets transmitted to/from a user that determines the relative importance of transmitting those packets during the upcoming opportunity to use the medium

D) The measurable end-to-end performance properties of a network service, which can be guaranteed in advance by a service-level agreement (SLA) between a user and a service provider

Correct Answer : The measurable end-to-end performance properties of a network service, which can be guaranteed in advance by a service-level agreement (SLA) between a user and a service provider