Which statements are true? A. X.25 is a connection-oriented network. B. X.25 doesn't support switched virtual circuits. C. Frame relay provides acknowledgements. D. Frame relay provides detection of transmission errors.
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Correct answer: A. A and D only
Explanation
X.25 is connection-oriented and supports SVCs. Frame relay detects errors (CRC) but does not acknowledge or retransmit. A and D.
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