CREATE TABLE table_38742 ("Model" TEXT, "Processors Supported" TEXT, "FSB/HT Frequency  ( MHz ) " TEXT, "Memory" TEXT, "PCI-Express" TEXT, "SATA" FLOAT, "PATA" FLOAT, "Sound" TEXT, "Network" TEXT, "Features" TEXT)

Which network has model nForce Professional 3400 MCP?
SELECT "Network" FROM table_38742 WHERE "Model" = 'nforce professional 3400 mcp'
SELECT "Network" FROM "table_38742" WHERE "Model" = 'nforce professional 3400 mcp'