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The Tier-1 operations are structured in 4 groups: the computing farm is man-aged managed by the Farming group; the Mass Storage System, the databases and the transfer service are managed by the Data Management group; the LAN and WAN connections of CNAF are managed by the Network group and, last but not least, the facilities of the center are managed by the Facility Management group. Besides these groups, the User Support group takes care of helping the users to efficiently exploit the Data Center infrastructure.
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