Boy, this is a toughie...I think it's the PARALLEL port, often noted as LPT1.
usb
A Parallel Port (LPT1 and LPT2)
Parallel Port
The printer is an output device i.e. it transmits data in the form of prints.
The optic nerve transmits visual date from the retina to the brain.
RS232 DB9 connectors Receives data serially from Pin No. 2 & Transmits data from Pin No.3.
Network
Parallel port devices are those devices which are connected to the computer via parallel ports. An example is Printer which is connected to the parallel port LPTx (Line Printer Terminal) eg: LPT1, LPT2, LPT3. Parallel ports were originally developed by IBM as a way to connect a printer to your PC. When a PC sends data to a printer or other device using a parallel port, it sends 8 bits of data (1 byte) at a time. These 8 bits are transmitted parallel to each other, as opposed to the same eight bits being transmitted serially (all in a single row) through a serial port. The standard parallel port is capable of sending 50 to 100 kilobytes of data per second.Answer-- A parallel port is a type of interface found on computers (personal and otherwise) for connecting various peripherals. It is also known as a printer port or Centronics port. The IEEE 1284 standard defines the bi-directional version of the port.
data sink
Parallel data transfer is transferring multiple bits of data at a time.
A server or a node
Data Transceiver
An inkjet printer