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Dimensionally it's not too small and not too big, not too slim or too fat. Part of the Kodak "Pocket Series," the Kodak V570 is very compact, with low-profile controls that won't snag pockets. In addition, the oversized 2. Finally, the camera's sensitivity maxes out at ISO 3200 equivalent in the "High Sensitivity" Best Shot mode.5 mm. If you're looking for a good "take anywhere" camera with great versatility, the Sony W100 deserves a closer look. Its size allows for both an optical viewfinder and a big LCD, as well as a good fit in the hand and pocket. The digital camera packs in resolution and a maximum sensitivity that not many DSLRs exceed. For composing images, the C360 offers both a real-image optical viewfinder as well as a 2. And because of the camera's high-resolution output, you can rest assured that even large print images will look detailed and vivid. Just when you thought the megapixel war was over, the Casio EXILIM ZOOM EX-Z1000 offers a whopping ten megapixel resolution from a 1/1. For close up shots the camera can focus from 12cms from the subject.x optical power zoom lens that ranges from 7.5-inch color

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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