CREATE TABLE table_609 ("Model number" TEXT, "Printer ports" TEXT, "Network ports" TEXT, "Network protocols" TEXT, "Firmware" TEXT, "Notes" TEXT)

What's the type of printer ports in the model number EX Plus3?
SELECT "Printer ports" FROM table_609 WHERE "Model number" = 'EX Plus3'
SELECT "Printer ports" FROM "table_609" WHERE "Model number" = 'EX Plus3'