Computer Networking
A 4 KHz noise less channel with one sample ever 125 per sec is used to transmit digital signals. Differential PCM with 4 bit relative signal value is used. Then how many bits per second are actually sent?

128 Kbps.
64 Kbps
None of these
32 Kbps
8 Kbps

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

to assign address to private network DTEs
None of these
universal accessibility for private network Data Terminal Equipment (DTE)
A and B both
adequate cost control mechanisms for administration of the private networks

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