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D-Link DFE-550FX Adapter
IEEE802.1p Priority Tagging
With the growing number of network applications, local area
networks (LANs) must deliver data for a wide variety applications.
Email, file transfers, database queries, voice over IP (VoIP), video-
conferencing and multimedia must all be delivered to the end-
user's. Some of the traffic, such as video-conferencing, is time-
critical. A slight delay in packet delivery can result in noticeable
degeneration of video and audio quality, while other traffic, such
as Email will not be noticeably affected by tiny delays. The large
number of programs run over today's networks can impede the
ability to deliver time-critical data. Even if available bandwidth is
not usually a problem on your network, during peak hours bursts
in network traffic can result in the delay of time-critical traffic.
IEEE802.1p defines eight levels of prioritization for Ethernet
packets. High priority packets will be sent through a network
using 801.2p-compliant switches first. Lower priority packets will
be transferred when bandwidth is available. When properly setup,
this ensures that time-critical data arrives on time and is not
affected by other traffic.
IEEE802.1Q VLANs
The IEEE802.1Q VLAN can help improve network performance
and security by segmenting the network into different VLANs.
IEEE802.1Q VLANs can limit broadcast traffic to a single VLAN
which prevents the effects of broadcast storms and provides
additional security for your network.
To set up GVRP VLANs, which supports dynamic registration, the
adapter should be connected to a switch with GVRP VLAN
capability.
For VLANs to function, the computer in which this NIC is
installed must be using Windows 95 or later.
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