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MCQ

The CCITT Recommendation X.25 specifies three layers of communications:

application, presentation and session

Session, transport and network

physical datalink and network

datalink, network and transport

None of the above

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What function does a serial interface perform in data communication?

Converts serial data into audio signals

Converts analog signals into digital signals

Converts parallel data into a stream of bits

Decodes incoming signals into computer data

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Which application allows a user to access and change remote files without actual transfer?

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The fundamental requirements of private-to-public network interconnection methods which need to be provided in gateways is/are

universal accessibility for private network Data Terminal Equipment (DTE)

adequate cost control mechanisms for administration of the private networks

to assign address to private network DTEs

A and B both

None of the above

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History and Generations

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Number System

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