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Across

1. A protocol used for secure communication over the internet, often used for virtual private networks (VPNs).

2. A widely accepted and recognized specification or protocol used for uniformity and compatibility.

Down

3. Cryptographic protocols designed to provide secure communication over a computer network.

4. A set of rules that govern the exchange of data between devices in a network.

5. A process in which two devices establish communication by exchanging predetermined signals or messages.

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