What is time-stamping?

This scheme is intended to order events consisting of
the transmission of messages. Each system 'i' in the network maintains a counter Ci.
Every time a system transmits a message, it increments its counter by 1 and attaches the
time-stamp Ti to the message. When a message is received, the receiving system 'j' sets
its counter Cj to 1 more than the maximum of its current value and the incoming timestamp
Ti. At each site, the ordering of messages is determined by the following rules: For
messages x from site i and y from site j, x precedes y if one of the following conditions
holds....(a) if Ti

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