After you complete this topic, you should be able to:

• Explain the purpose of MPI_Probe
• Distinguish between MPI_Probe and MPI_Test
• Identify two wildcards MPI provides for sending/receiving
• Explain why wildcards should be used with caution
• Explain the utility of a status variable
• Demonstrate using status as an input parameter
• Compare a defined and undefined status

• Familiarity with HPC paradigms and MPI Basics.
• Experience programming in a high-level language such as Fortran or C would be helpful, but the reader can still follow along to understand the concepts and methodologies.
• A basic familiarity with parallel programming concepts