Identify 2 features of X.25?
A.) Supports only IP
B.) Utilizes switched and permanent virtual circuits
C.) Contains minimal flow control and error recovery
D.) Utilizes LAPB as it's data-link protocol
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Answer: B D
X.25 utilizes LAPB and uses switched and permanent VC's. It
supports
multiple layer protocols and is heavy laden with error
detection and
correction mechanisms.
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