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MCQ

The signal to noise ratio for a voice grade line is 30.1 dB (decibels) or a power ratio of 1023:1. The maximum achievable data rate on this line whose spectrum ranges from 300 Hz to 4300 Hz is

6200 bps

9600 bps

34000 bps

31000 bps

None of the above

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Which of the following frequency ranges is used for AM radio transmission?

Very Low Frequency : 3 kHz to 30 kHz

Medium Frequency : 300 kHz to 3 MHz

High Frequency : 3 MHz to 30 MHz

Very High Frequency : 30 MHz to 300 MHz

None of the above

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An information utility can offer a user

instant bonds and stock quotations

news stories from wire services

complete airline schedules for all domestic flights

All of the above

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Which of the following provides a storage mechanism for incoming mail but does not allow a user to download messages selectively?

SMTP

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IMAP

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Which of the following technique is used for encapsulation?

a technique used in best-effort delivery systems to avoid endlessly looping packets.

a technique used by protocols in which a lower level protocol accepts a message from a higher level protocol and places it in the data portion of the low level frame.

One of the pieces that results when an IP gateway divides an IP datagram into smaller pieces for transmission across a network that cannot handle the original datagram size

All of the above

None of the above

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How many bits internet address is assigned to each host on a TCP/IP internet which is used in all communications with the host?

16 - bits

32 - bits

48 - bits

64 - bits

None of the above

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