Computer Networking
Which of the following communications modes support two-way traffic but in only one direction of a time?

None of these
half-duplex
full-of the above
three-quarters duplex
simplex

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Computer Networking
Which of the following technique is used for Time-To-Line (TTL)?

a technique used in best-effort delivery system 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.
None of these
All of these

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