To capture the critical traffic to prioritize is not something I work with in advanced QoS features. Regarding VLAN support in bandwidth management, we are not utilizing VLAN for the infrastructure as we have a minimal requirement for VLAN, so we have not yet implemented any of the features relevant to the virtual LANs. It's very hard to answer the question about minor improvements D-Link Ethernet Switches could do with their products because the products I'm dealing with are just plug-and-play, unmanaged switches. It would be more appropriate to comment on features if I had been using Layer 2 or Layer 3 switches for at least a couple of months. I don't think there are any disadvantages I can point out for the product.
