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?

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

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Computer Networking
ICMP (Internet Control Message Protocol) is

a protocol used to monitor computers
None of these
a TCP/IP protocol used to dynamically bind a high level IP Address to a low-level physical hardware address
a protocol that handles error and control messages
a TCP/IP high level protocol for transferring files from one machine to another

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