This is to insure that definitions are available to the client even if GUPs are unavailable. To understand the bandwidth savings of using a GUP it is important to understand the amount of traffic generated by definitions updates.A freshly installed client will take a few hundred megabytes to get updated to the latest definition set.Depending on how you publish definitions within your environment, something else to consider is the difference between cheap and expensive bandwidth.In some environments client communication will go over the WAN while Internet traffic will traverse through a cheaper local ISP.This is the same whether you have ten clients over the remote WAN link or two hundred.
The GUP technology in SEP allows administrators to designate client systems within the environment to distribute client definitions in a peer fashion.
While in the field we have seen clients use GUPs in different ways, the purpose of the GUPs was to reduce bandwidth requirements.
On a subnet over a WAN link, you would have a single client retrieving definitions from the SEPM.
If you are not certain what version of Symantec Endpoint Protection you are using, launch Symantec and click the “Help” or “Help and Support” button in the upper right-hand corner of the window. If you recently received a pop-up message from Symantec indicating that your virus definition files are out of date, and you are unable to update them, this is another indication that you are using an unsupported version of Symantec Endpoint Protection.
If you are using the managed Symantec Endpoint Protection client (indicated by a green dot on the Symantec shield in your system tray) and the version number is 11, please contact IT support in your department or Computing Services and Systems Development directly to obtain the latest version.