D-Link DES-1008D User Manual

10/100 Dual-Speed Switch User’s Guide
Introduction
5
Increasing Network Bandwidth
A switch is capable of receiving and forwarding transmissions for
more than one port at the same time. In the case of half-duplex
ports which can either send or receive data, the switch can handle
transmissions from up to half of its ports (since the other half are
presumably receiving). In the case of full-duplex ports which can
send and receive at the same time, the switch can handle
simultaneous transmissions from all of its ports.
When a switch is handling two transmissions simultaneously, it
actually increases the bandwidth of the network. If, for example, a
switch is simultaneously transferring data from two 100 Mbps
ports to two other ports, the switch is handling 200 Mbps of traffic.
The switch has effectively doubled the overall network capacity. If
the ports are using full-duplex connections and the receiving ports
are simultaneously transmitting, then the switch is handling 400
Mbps of data, doubling the overall network bandwidth once again.
A switch that can process simultaneous full-duplex traffic from all
of its ports is able to operate at full wire speed. The total amount of
traffic a switch can handle is called the aggregate bandwidth.
This multiplication of network bandwidth allows high-speed,
collision-free communications between different network segments
that are interconnected through the switch.
High-speed Backbones and Servers
The ability of switches to support high-bandwidth, full-duplex,
collision-free connections makes them perfect for interconnecting
network segments, in other words, operating as the backbone of
the network. Full-duplex Fast Ethernet switch to switch
connections operate at 200 Mbps. Network servers (or any other
computer) using full-duplex Fast Ethernet NIC’s can also have a
200 Mbps collision-free connection to the network.

D-Link DES-1008D Specifications

General

Switch type	Unmanaged
Switch layer	-
Power connector	DC-in jack
Installed SFP modules quantity	0
Basic switching RJ-45 Ethernet ports type	Fast Ethernet (10/100)
Basic switching RJ-45 Ethernet ports quantity	8
10G support	No
Full duplex	Yes
Networking standards	IEEE 802.3, IEEE 802.3x
Copper ethernet cabling technology	100BASE-TX, 10BASE-T
MAC address table	1024 entries
Product color	Black
Maximum data transfer rate	100 Mbit/s
Mean time between failures (MTBF)	116186 h
Input current	1 A
Output voltage	5 V
Package depth	158 mm
Package width	104 mm
Package height	94 mm
Package weight	310 g
Pallet width	1200 mm
Pallet length	1100 mm
Pallet height (air)	1885 mm
Pallet gross weight (air)	330500 g
Quantity per pallet (air)	1000 pc(s)
Shipping (inner) case width	211 mm
Shipping (inner) case height	350 mm
Shipping (inner) case length	543 mm
Shipping (inner) case weight	6230 g
Shipping (inner) case net weight	3960 g
Number of cartons per pallet (air)	50 pc(s)
Quantity per shipping (inner) case	20 pc(s)
Harmonized System (HS) code	85176990