Network traffic is generated whenever Trend Micro releases an updated version of any
product
component.
To reduce network traffic generated during pattern file updates, Worry-Free Services uses a method called incremental
update. Instead of downloading the full updated pattern file every time, new patterns
that have
been added since the last release are downloaded. The Security Agent also tries to
update from
another Security Agent on the same network to further reduce network traffic.
For more information on the update method, see About Updates.
Regularly updated Security Agents only have to download the incremental pattern,
which is approximately 5KB to 200KB. The full pattern is substantially larger even
when
compressed and takes longer to download.
Trend Micro releases new pattern files daily. However, if a particularly damaging
virus is
actively circulating, Trend Micro releases a new pattern file as soon as a pattern
for the threat
is available.