D-Link DGE-530T User Manual - Ieee 802.1Q Vlans
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D-Link DGE-530T User Manual
Section 3 - Advanced Features
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.
email, file transfers, database queries, voice over IP (VoIP), video-conferencing, and multimedia must all be delivered to the
end-users. Some of the traffic, such as video-conferencing, is of a higher priority with a slight delay of packets resulting in
noticeable degeneration of video and audio quality. Other traffic, such as email, will not be noticeably affected by tiny delays.
The large number of programs that run over today’s networks serves to impede the ability to deliver time-critical data. Even
if bandwidth is not usually a problem on your network, during peak hour bursts in network traffic can result in the delay of
time-critical traffic.
IEEE 802.1p defines seven 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 whenever 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 VLANs. IEEE 802.1Q
VLANs can limit broadcast and node-to-node (unicast) traffic to a single VLAN. This limits the effects of broadcast storms and
provides additional security for your network.
For VLANs to function, the computer in which this NIC is installed must be using Windows
®
2000, XP, 2003 or later as its operating
system.