QOS amenity of network

QOS is the basic amenity of network. With its implementation various attacks could be halted. Below is the varios steps which are required to implement QOS in network.Steps of implementing QOS
Step 1:- Classification
Tools used for classification
Access Control List (ACL)
COS
Differentiated Services Code Point
Input-interface
Media Access Control (MAC) address
Packet length
Precedence
Protocol
VLAN

Step 2:- Queuing

Marking
Policing
Drop


Steps 3:- Congestion Management
Queue-limit
Random-dete
Bandwidth
Fair-queue
Priority
Shape