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
All of these
None of these
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.

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Computer Networking
The term 'duplex' refers to the ability of the data receiving stations to echo back a confirming message to the sender. In full duplex data transmission, both the sender and the receiver

can send or receive data one at a time
None of these
can do one way data transmission only
cannot talk at once
can receive and send data simultaneously

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