The term Quality of Service, abbreviated QoS, refers to network resource control mechanisms. Quality of Service is the ability to provide different priority to different applications, users, or data flows, or to guarantee a certain level of performance to a data flow.  Meer

Network management refers to the activities, methods, procedures, and tools that pertain to the operation, administration, maintenance, and provisioning of networked systems, which includes controlling, planning, allocating, deploying, coordinating, and monitoring the resources of a network.  Meer

The view presented in The Internet and Its Protocols is at once broad and deep. It covers all the common protocols and how they combine to create the Internet in its totality.  Meer