1. 1 PUNCH PUNCH (Purdue University Network Computing Hubs) is a distributed network-computing infrastructure that allows geographically dispersed users to run unmodified tools via standard Web browsers http://punch.purdue.edu/

2. 2 PUNCH Today PUNCH Student Web Browser School 1School 2 School 1School 2

3. 3 Remote Execution Data access Communication Monitoring Resource Management Location and allocation Resource information, monitoring Problems to Solve

4. 4 Authentication (security) Virtual accounts Accounting How the user can be charged ? How ensure the QoS ? User Interfaces (www) Problems to Solve

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