Atlantis Land A02-G4(8)/M2 Manuale d'uso - Pagina 7

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environments, it provides a straightforward upgrade and takes

advantage of the existing investment in hardware, software, and

personnel training.

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 is automatically forwarded by the switch, without interfering

with any other segments. This allows the total network capacity to be

multiplied, while still maintaining the same network cabling and

adapter cards.

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.