Which statement about DNS is true?

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answerhappygod
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Which statement about DNS is true?

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Which statement about DNS is true?

A. The client-server architecture is based on push-pull messages.
B. Query and response messages have different format.
C. In the DNS message header, the QR flag set to 1 indicates a query.
D. In the DNS header, an Opcode value of 2 represents a server status request.
E. In the DNS header, the Rcode value is set to 0 for format error.
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