Encapsulating protocols for tunneling across diverse networks is the primary application of GRE, making it useful for creating virtual point-to-point links over an IP internetwork. It enables the encapsulation of packets from one protocol suite within the datagram encapsulations of another protocol suite, facilitating connectivity across heterogeneous networks.
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What does GRE stand for and what does it do?
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How does GRE work in a network tunnel?
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What are some use cases for implementing GRE tunnels?