Operation Manual

VigorSwitch G1080 User’s Guide
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This chapter will tell you the basic concept of features to manage this switch and how they
work.
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Ethernet originated and was implemented at Xerox in Palo Alto, CA in 1973 and was
successfully commercialized by Digital Equipment Corporation (DEC), Intel and Xerox
(DIX) in 1980. In 1992, Grand Junction Networks unveiled a new high speed Ethernet with
the same characteristic of the original Ethernet but operated at 100Mbps, called Fast
Ethernet now. This means Fast Ethernet inherits the same frame format, CSMA/CD,
software interface. In 1998, Gigabit Ethernet was rolled out and provided 1000Mbps. Now
10G/s Ethernet is under approving. Although these Ethernet have different speed, they still
use the same basic functions. So they are compatible in software and can connect each
other almost without limitation. The transmission media may be the only problem.
In the above figure, we can see that Ethernet locates at the Data Link layer and Physical
layer and comprises three portions, including logical link control (LLC), media access
control (MAC), and physical layer. The first two comprises Data link layer, which
performs splitting data into frame for transmitting, receiving acknowledge frame, error
checking and re-transmitting when not received correctly as well as provides an error-free
channel upward to network layer.