D-Link dgs-1016d/g [12/41] P and qos

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

essential to coping with the network bottlenecks that frequently develop as

computers and their bus speeds get faster and more users use applications

that generate more traffic. 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 bandwidth be

created, but other less critical traffic can be limited, so bandwidth can be

saved. The Switch has separate hardware queues on every physical port to