Communication with endpoint

Hi everyone,

I'm thinking about using Symantec's products but I have a few questions about them. To be more certain, I have a few questions about the communication between the client (the endpoint) and the cloud.

- How often do they communicate?

- Can I set this time interval to a desired value?

- If yes, what are the limits?

- Can both sides start communication, or only one of them?

Thanks for the answers