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(a)In a 1-way handshake host A sends a message to host B,and assumes
that it is connected.Give a state diagram for this protocol,and a
event diagram to show how it can fail.[4 marks ] (b)Describe an advantage and a disadvantage of using a variable sliding
window protocol rather than a normal sliding window protocol.[2 marks
] (c)Explain how UDP preserves the message boundary defined by the
application. [3 marks ] (d)Convert the following event diagram into state diagram,using the
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