Ñ äëÿ ïðîôåññèîíàëüíûõ ïðîãðàììèñòîâ


         

Ôàéëîâûé ñåðâåð


Ôàéëîâûé ñåðâåð íàõîäèòñÿ â öåíòpå ñåòè çâåçäîîápàçíîé òîïîëîãèè è îñóùåñòâëÿåò ïîñëåäîâàòåëüíûé êîíòpîëü ñîñòîÿíèé êàæäîãî ïîñëåäîâàòåëüíîãî ïîpòà â ñèñòåìå. Ðàáî÷àÿ ñòàíöèÿ ñèãíàëèçèpóåò î òpåáîâàíèè íà ïîëó÷åíèå èëè ïåpåäà÷ó ôàéëà, ïîìåùàÿ ñèìâîë "r" èëè "s" â ñâîé ïîpò. Ñèìâîë "s" îçíà÷àåò òpåáîâàíèå íà ïåpåäà÷ó ôàéëà; ñèìâîë "r" îçíà÷àåò òpåáîâàíèå íà ïîëó÷åíèå ôàéëà (è ñîõpàíåíèå åãî) ñ ïîìîùüþ ôàéëîâîãî ñåðâåðà.

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"ÊÎËÜÖÎ"

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"ÇÂÅÇÄÀ"

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Ðèñ. 6.1. Ñåòè êîëüöåâîé è çâåçäîîápàçíîé òîïîëîãèè.

Ïpè påãèñòpàöèè   ïîÿâëåíèÿ   â  îäíîì  èç  ïîpòîâ  ìàpêåpà,

ñîîòâåòñòâóþùåãî òpåáîâàíèþ íà  ïîëó÷åíèå  èëè  ïåpåäà÷ó  äàííûõ,

ôàéëîâûé             ñåðâåð              âûïîëíÿåò   åãî,   à   çàòåì   îñóùåñòâëÿåò

ïîñëåäîâàòåëüíûé êîíòpîëü ñîñòîÿíèé âñåõ  ïîñëåäîâàòåëüíûõ ïîpòîâ




Ñîäåðæàíèå  Íàçàä  Âïåðåä