A few reminders
SDN: prospects and challenges -Analysis of network operation engineering

The provision of network services such as Virtual Private Networks (VPNs) relies on the combined activation of various functions, including :

• traffic routing and routing functions within the virtual private network ;

• Quality of Service (QoS) functions, such as the classification and marking of traffic circulating within the virtual private network;

• dynamic tunnelling ;

• security functions, such as dynamic filter setting and activation.

• Such network services are constantly expanding. Their variety and complexity make their engineering and...