Network transmission time accounts for 20% of a null rpc and 80% of an rpc that transmits 1024 user bytes (less than the size of a network packet). By what percentage will the times for these two operations improve, if the network is upgraded from 10 megabits / second to 100 megabits/second?
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In the first case, the implementor assumes that if the client observes an omission failure it
cannot tell whether it is due to loss of the request or reply message, to the server having
crashed or having taken longer than usual. Therefore when the request is re-transmitted the
client may receive late replies to the original request. The implementation must deal with this.
In the second case, an omission failure observed by the client cannot be due to the server
taking too long. Therefore when the request is re-transmitted after time T, it is certain that a
late reply will not come from the server. There is no need to deal with late replies
Explanation:
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