Ieee 802.1P Priority Tagging; Ieee 802.1Q Vlans - D-Link DFE-550FX User Manual

D-Link DFE- 550FX Adapter
switch or hub settings may be needed.

IEEE 802.1p Priority Tagging

With the growing number of network applications, local area
networks (LANs) must deliver data for a wide variety of
applications: e-mail, file transfers, database queries, voice over
IP (VoIP), video-conferencing, and multimedia must all be
delivered to end-users. 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 e -mail will not be noticeably affected
by tiny delays. The large number of programs running 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.
IEEE 802.1p defines eight levels of prioritization for Ethernet
packets. High priority packets will be sent through a network
using 802.1p-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.

IEEE 802.1Q VLANs

The IEEE 802.1Q VLAN can help improve network performance
and security by segmenting the network into different VLANs.
IEEE 802.1Q VLANs can limit broadcast traffic to a single VLAN
that 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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