When the latest version
of a full pattern file is available for download from the Trend Micro ActiveUpdate
server, 14
"incremental patterns" also become available. Incremental patterns are smaller versions
of the full
pattern file that account for the difference between the latest and previous full
pattern file
versions. For example, if the latest version is 175, incremental pattern v_173.175
contains
signatures in version 175 not found in version 173 (version 173 is the previous full
pattern version
since pattern numbers are released in increments of 2. Incremental pattern v_171.175
contains
signatures in version 175 not found in version 171.
To reduce network traffic generated when downloading the latest
pattern, Apex One performs component
duplication, a component update method where the Apex One server or Update Agent
downloads only incremental patterns. See Update Agent Component Duplication for information on how Update Agents perform component duplication.
Component duplication applies to the following components:
-
Virus Pattern
-
Smart Scan Agent Pattern
-
Damage Cleanup Template
-
IntelliTrap Exception Pattern
-
Spyware/Grayware Pattern
-
Spyware Active-monitoring Pattern