User Manual

Gigabit Ethernet Technology
Gigabit Ethernet is an extension of IEEE 802.3 Ethernet utilizing the
same packet structure, format, and support for CSMA/CD protocol, full
duplex, flow control, and management objects, but with a tenfold
increase in theoretical throughput over 100-Mbps Fast Ethernet and a
hundredfold increase over 10-Mbps Ethernet. Since it is compatible
with all 10-Mbps and 100-Mbps Ethernet environments, Gigabit
Ethernet provides a straightforward upgrade without wasting a
company’s existing investment in hardware, software and trained
personnel.
The increased speed and extra bandwidth offered by Gigabit Ethernet
is necessary to coping with the network bottlenecks; more computers
and their bus speeds getting faster, and more applications generate
more traffic in the network. Upgrading key components, such as your
backbone and servers to Gigabit Ethernet can greatly improve network
response times as well as significantly speed up the traffic between
your subnets.
Gigabit Ethernet supports video conferencing, complex imaging and
similar data-intensive applications. Likewise, since data transfers occur
10 times faster than Fast Ethernet, servers outfitted with Gigabit
Ethernet NIC’s are able to perform 10 times the number of operations in
the same amount of time.
802.1p and QoS
The DGS-1024D and DGS-1016D Switches support 802.1p priority
queuing Quality of Service. The implementation of QoS (Quality of
Service) and benefits of using 802.1p priority queuing are described
here.
Advantages of QoS
QoS is an implementation of the IEEE 802.1p standard that allows
network administrators a method of reserving bandwidth for important
functions that require a large bandwidth or have a high priority, such as
VoIP (voice-over Internet Protocol), web browsing applications, file
server applications or video conferencing. Not only can a larger