Computer Networking
A receiving host has failed to receive all of the segments that it should acknowledge. What can the host do to improve the reliability of this communication session?

Decrease the sequence number.
Restart the virtual circuit.
Send a different source port number.
Decrease the window size.

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Computer Networking
The difference between a multiplexer and a statistical multiplexer is

None of these
Multiplexers often waste the output link capacity while statistical multiplexers optimize its use
Multiplexers use Time Division Multiplexing (TDM) while statistical multiplexers use Frequency Division Multiplexing (FDM)
Multiplexer use X.25 protocol, while statistical multiplexers use the Aloha protocol
Statistical multiplexers need buffers while multiplexers do not need buffers

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

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

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