Sandbox Vs Farm level solutions Sharepoint 2010 - Dig SharePoint

Farm Level Solutions -
Farm-level solutions are scoped at the SharePoint farm level, so they have full-trust access to all the resources and functionality in SharePoint.

Application build using Farm level –

All SharePoint applictaions can be deployed with Farm level scope.

Sandboxed Solutions  –
Sandboxed Solutions are solutions that run in the context of a site collection. Sandboxed solutions are restricted.

Application build using Sandboxed Solutions –

They cannot connect to resources that are not on the local server, access a database, call unmanaged code, write to the system disk, or access resources in a different site collection. Sandboxed solutions, though,do have the capability to monitor and shut down applications, should they have any performance issues.