QoS fields
The QoS fields used by the network device depend on the capabilities of the device and the QoS deployments of the network. Below is a little info about a few of these fields.
642-642 QoS
A collection of 2 posts
IP Precedence DSCP and CoS relationships
As part of studying the 642-642 QoS exam course is seems quite important to understand the relationship between the various ways of marking traffic. Below are some notes I've made so far about