Explain what is meant by the term ‘integrated service digital network’. Give three reasons a company might choose an ISDN link in preference to a leased line.
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Explain pure-ALOHA and slotted- ALOHA systems. Give the expression for throughout for each,clearly explaining the various terms.
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Assuming classful addressing, find the no of subnets and the no of hosts per subnet for the following blocks: (i) 122.45.77.32/20 (ii) A class B block having mask of 255.255.192.0