Glossary

Q

QinQ
QinQ (aka VLAN stacking) adds another layer of IEEE 802.1Q tag (called “metrotag” or “PE-VLAN”) to the 802.1Q tagged packets that enter the network and allows service providers to offer certain services, such as internet access on specific VLANs.
QoS
Quality of service
Quad play
The provision of voice, video, data and mobile services.