Error 404--Not Found |
From RFC 2068 Hypertext Transfer Protocol -- HTTP/1.1:10.4.5 404 Not FoundThe 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. |
Last week Senior Editor Phil Hochmuth detailed a management standard picking up steam within the IETF called sFlow. Apparently sFlow hasn't gotten too much attention until recently when traffic speeds began to grow to gigabit and 10G in some companies. Proponents says sFlow will become more important for tracking network performance and providing network security. SFlow uses a random sampling of LAN and WAN data packet flows across an entire network to provide a real-time view of network traffic performance. (Foundry and HP offer sFlow-based switches today) A cousin to sFlow and a proposed IETF standard, IP Flow Information Export or IPFIX, also uses traffic flows as a means for management. IPFIX defines a method for routers and switches to export traffic-flow data to management systems. If adopted, the export standard would be included in network gear from Cisco, Nortel, Riverstone Networks and others.
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