Without up-to-date definitions, SEP becomes blind. It can still use heuristic and behavioral analysis, but its accuracy and speed drop significantly.
Symantec employs a layered defense strategy, utilizing different types of definitions to protect various stages of the attack chain: symantec endpoint protection definitions
When definitions stop updating, it is usually due to one of three issues: Without up-to-date definitions, SEP becomes blind
Every administrator has faced a situation where the Management Server cannot reach the internet, or a specific client is stuck with an outdated definition revision. This is where the file comes in. Without up-to-date definitions