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DGS-1024D
Инструкция по эксплуатации Страница: 8

D-Link DGS-1024D [8/32] Section 1

D-Link DGS-1016TL/DGS-1024TL Gigabit Ethernet Switch

SECTION 1

Introduction

Gigabit Ethernet Technology

Switching Technology

Switch Description

Features

Front Panel Components

LED Indicators

Rear Panel Description

Side Panel Description

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, 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 are essential to coping with the network

bottlenecks that frequently develop as computers and their busses 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.

Switching Technology

Another key development pushing the limits of Ethernet technology is in the field of switching technology. A

switch bridges Ethernet packets at the MAC address level of the Ethernet protocol transmitting among connected

Ethernet or Fast Ethernet LAN segments.

Switching is a cost-effective way of increasing the total network capacity available to users on a local area

network. A switch increases capacity and decreases network loading by making it possible for a local area

network to be divided into different segments which don’t compete with each other for network transmission

capacity, giving a decreased load on each.

The Switch acts as a high-speed selective bridge between the individual segments. Traffic that needs to go from

one segment to another (from one port to another) is automatically forwarded by the Switch, without interfering

with any other segments (ports). This allows the total network capacity to be multiplied, while still maintaining

the same network cabling and adapter cards.

For Fast Ethernet or Gigabit Ethernet networks, a switch is an effective way of eliminating problems of chaining

hubs beyond the “two-repeater limit.” A switch can be used to split parts of the network into different collision

domains, for example, making it possible to expand your Fast Ethernet network beyond the 205-meter network

diameter limit for 100BASE-TX networks. Switches supporting both traditional 10Mbps Ethernet and 100Mbps

Fast Ethernet are also ideal for bridging between existing 10Mbps networks and new 100Mbps networks.

Switching LAN technology is a marked improvement over the previous generation of network bridges, which

were characterized by higher latencies. Routers have also been used to segment local area networks, but the cost

of a router and the setup and maintenance required make routers relatively impractical. Today’s switches are an

ideal solution to most kinds of local area network congestion problems.

D-Link DGS-1024D [8/32] Section 1

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