Table: printer_specs
Columns: model_number
printer_ports
network_ports
network_protocols
firmware
notes

Question: What's the type of printer ports in the model number EX Plus3?
SQL: SELECT "printer_ports" FROM printer_specs WHERE "model_number" = 'EX Plus3'

Question: What is the number of the model with three parallel printer ports?
SQL: SELECT "model_number" FROM printer_specs WHERE "printer_ports" = 'Three Parallel'

Question: What is the type of the printer ports included in the EX Plus3 model number?
SQL: SELECT "printer_ports" FROM printer_specs WHERE "model_number" = 'EX Plus3'

Question: What are the network protocols for the model that has been discontinued in favor of the EN1700?
SQL: SELECT "network_protocols" FROM printer_specs WHERE "notes" = 'Discontinued in favor of the en1700'