A. Whether SMS uses SMB or BITS to download software depends on which one the distribution point that the client is connecting to supports and how the application is being installed. To be able to use BITS (which allows checkpoint restarts of downloads and bandwidth throttling), the distribution point must have Microsoft IIS installed and WWW Distributed Authoring and Versioning (WebDAV) and BITS enabled. SMS will use BITS only if

  • you've configured the application as "download and execute," which means the installation files for the program are first sent to the machine, and the application is then installed from the local cached copy of the installation files
  • the client has sufficient cache to store the complete package data