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HP announces four new digital cameras. As mentioned above, the KD-400Z stores images on Sony Memory Sticks or SD/MMC memory cards, both available separately in a variety of storage capacities. Compact and rugged, the KD-400Z should stand up to heavy usage. If you're looking for a good “take anywhere” camera with great versatility and good color and tonality, the Sony DSC-W100 deserves a close look. It will certainly be interesting to see how Casio has managed to get a handle on noise from such a high resolution sensor, particular at a sensitivity that's ordinarily the territory of digital SLRs. Cyber-shot DSC-T30 The DSC-T30 continues a Sony tradition of high quality in the subcompact category, packing more features into a smaller space than most anything else out there, but this time with the added bonus of optical image stabilization. The first is Nikon Camera Control Pro which is a development of Nikon Capture Camera Control. Novices and advanced amateurs alike will appreciate its offering of both point-and-shoot automatic and full manual exposure control, and its six pre-programmed scene modes help with more tricky subjects. Offering average image quality, good performance, and plenty of helpful exposure modes, the C533 will make a great choice for

Generic Routing Encapsulation (GRE) is a tunneling protocol designed to encapsulate a wide variety of network layer packets inside IP tunneling packets. The original packet is the payload for the final packet. The protocol is used on the Internet to secure virtual private networks.

GRE was developed by Cisco and was designed to be stateless; the tunnel end-points do not monitor the state or availability of other tunnel end-points. This feature helps service providers support IP tunnels for clients, who won't know the service provider's internal tunneling architecture; and it gives clients the flexibility of reconfiguring their IP architectures without worrying about connectivity. GRE creates a virtual point-to-point link with routers at remote points on an IP internetwork.

One key difference between an encrypted GRE tunnel and an IPsec tunnel is the ability to make use of Multicast protocols over GRE tunnels. An example would be the use of OSPF over a GRE tunnel.

GRE uses IP protocol number 47.

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