Physical
Media Dependent (Pmds)
To meet these distance objectives, four PMDs were selected.
The task force selected a 1310 nanometer serial PMD to meet its 2km and 10km
single-mode fiber (SMF) objectives. It also selected a 1550 nm serial solution
to meet (or exceed) its 40km SMF objective. Support of the 40km PMD is an
acknowledgement that Gigabit Ethernet is already being successfully deployed in
metropolitan and private, long distance applications. An 850 nanometer PMD was
specified to achieve a 65-meter objectiveover multimode fiber using serial 850
nm transceivers.
10 Gigabit
Ethernet In The Marketplace
The
accelerating growth of worldwide network traffic is forcing service providers,
enterprise network managers and architects to look to ever higher-speed network
technologies in order to solve the bandwidth demand crunch. Today, these
administrators typically use Ethernet as their backbone technology. Although
networks face many different issues, 10 Gigabit Ethernet meets several key
criteria for efficient and effective high-speed networks:
Introduction
From its
origin more than 25 years ago, Ethernet has evolved to meet the increasing
demands of packet-switched networks. Due to its proven low implementation cost,
its known reliability, and relative simplicity of installation and maintenance,
its popularity has grown to the point that today nearly all traffic on the
Internet originates or ends with an Ethernet connection. Further, as the demand
for ever-faster network speeds has grown, Ethernet has been adapted to handle
these higher speeds and the concomitant surges in volume demand that accompany
them.
The 10
gigabit ethernet alliance
The purpose of
the 10 Gigabit Ethernet proposed standard is to extend the 802.3 protocols to
an operating speed of 10 Gbps and to expand the Ethernet application space to
include WAN links.
Conclusion
As the
Internet transforms longstanding business models and global economies, Ethernet
has withstood the test of time to become the most widely adopted networking
technology in the world. Much of the world’s data transfer begins and ends with
an Ethernet connection. Today, we are in the midst of an Ethernet renaissance
spurred on by surging E-Business and the demand for low cost IP services that
have opened the door to questioning traditional networking dogma.
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