<P> Time to live ( TTL ) or hop limit is a mechanism that limits the lifespan or lifetime of data in a computer or network . TTL may be implemented as a counter or timestamp attached to or embedded in the data . Once the prescribed event count or timespan has elapsed , data is discarded or revalidated . In computer networking , TTL prevents a data packet from circulating indefinitely . In computing applications , TTL is commonly used to improve the performance and manage the caching of data . </P>
<P> Time to live ( TTL ) or hop limit is a mechanism that limits the lifespan or lifetime of data in a computer or network . TTL may be implemented as a counter or timestamp attached to or embedded in the data . Once the prescribed event count or timespan has elapsed , data is discarded or revalidated . In computer networking , TTL prevents a data packet from circulating indefinitely . In computing applications , TTL is commonly used to improve the performance and manage the caching of data . </P>
what does time to live mean in dns
what does time to live mean in dns
a mechanism that limits the lifespan or lifetime of data in a computer or network
a mechanism that limits the lifespan or lifetime of data in a computer or network