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New Data Center The New Data Center: Wireless & Mobility
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The New Data Center: Server Virtualization
Server Virtualization

Error 404--Not Found

Error 404--Not Found

From RFC 2068 Hypertext Transfer Protocol -- HTTP/1.1:

10.4.5 404 Not Found

The server has not found anything matching the Request-URI. No indication is given of whether the condition is temporary or permanent.

If the server does not wish to make this information available to the client, the status code 403 (Forbidden) can be used instead. The 410 (Gone) status code SHOULD be used if the server knows, through some internally configurable mechanism, that an old resource is permanently unavailable and has no forwarding address.

ROADM (reconfigurable optical add/drop multiplexer)

Devices that let service providers more efficiently provision DWDM services across a metropolitian-Ethernet network.

ROADMs are used to remotely reconfigure, add and drop capacity at each node, which allows for network upgrades without affecting in-service traffic. This helps minimize operational expenditures by reducing the number of truck rolls required to upgrade and maintain metropolitan and regional transport networks, according to Alcatel, which sells ROADM-based products.

Also, ROADM lets service providers design networks once yet provision circuits and services as often as needed, regardless of traffic forecasts.


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