Computer Networking
Which of the following technique is used for fragment?

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

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Computer Networking
The MAC (Media Access Control) address of the network card is used in both Ethernet and Token-Ring networks and is essential for communication. What does MAC provide?

The logical domain address for the workstation
An alias for the computer name
A logical address that identifies the workstation
A physical address that is randomly assigned each time the computer is started
A physical address that is assigned by the manufacturer

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