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

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
a technique used in best-effort delivery system to avoid endlessly looping packets.
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 these
None of these

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Computer Networking
Modulation is the process of

Multiplexing various signals into high speed line signals
performing data encryption.
converting analog signals to digital signals
converting digital signals to analog signals

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