Think of the communication stream like a single laned road (serial) and a highway (parallel). Although the data is going in one direction, the data is sent bit-by-bit with serial communication (single lane road-car by car). With parallel the data is moved multi bits at a time (a multi lane highway going in the same direction with full of traffic) feature: serial communication means less number of wire and it is slow, one by one bit of message signal is send to receiver.parallel communication has so many numbers of wire & it is fast.
Serial communication : Modem.
Parallel Communication : Printer.
Serial Communications and Parallel communications both define a way of transportation of data over networks.
From a system perspective, you can also refer to "parallel" channels for redundancy of critical serial streams, where multiple identical copies of data are sent simultaneously, and the receiver decides which data is valid, often by "voting" after detecting errors in the data on one or more channels. In this case, the parallel channels provide no increase in data throughput (compared to a single error-free channel), other than by reducing the need for time-consuming re-transmissions when errors are detected. It is a trade-off between speed and reliability. A parallel link transmits several streams of data (perhaps representing particular bits of a stream of bytes) along multiple channels (wires, printed circuit tracks, optical fibres.
Both serial ports and parallel ports are examples of computer technology that were once cutting edge, but now have been replaced by newer methods of transferring data from hard drives to ancillary devices. However, there are many personal computers and other devices in use today that make use of a serial port, a parallel port, or both. The difference between the serial and parallel port is not always understood, owing to the similar design of both ports. Here is some background on each type of port and what they were designed to accomplish.
Of the two, the parallel port is the older port design. The first use of a parallel port was in the early 1970's and allowed printers to be hooked directly into a mainframe and print orders carried out by entering a section of code through the command station. The parallel port allowed for a one way transmission of data from the source to the printer.
As the personal computer came into common use, the parallel port remained a popular option for attaching a printer to the hard drive of the system. In some circles, the port became commonly known as the printer port, since that function was the most common application of the device. Some manufacturers would go as far as customizing the design of the parallel port so that only certain types of printers could be used with certain brands of personal computers. However, by the mid 1990's, the parallel ports on most personal computers had been standardized to accommodate just about any make and model of printer.
In addition, the parallel printer became somewhat more functional, in that the design was used to provide one way communication between the hard drive and a number of ancillary devices. Early external modems and storage devices are a couple examples of the broader use of parallel ports. However, since the beginning of the 21st century, the parallel port has largely been replaced by the USB port, although some ancillary devices still allow for connection by both means.
One key difference between a serial and parallel port is that the serial port allows for data to be transferred in from a remote device or transferred out from the hard drive to a remote device. This two-way communication process makes it possible to connect workstations to larger terminals as well as a wide range of peripheral devices.
For most of the history of personal computers, both the serial and parallel port were the most common means of data transfer and communication. However, with both the serial and parallel port replaced by the use of USB ports, fewer new devices are designed to include either a serial or parallel port. Older personal computers that feature a serial and parallel port often require an adapter cable in order to make use of the latest generation of peripheral devices.
A Shift of Course
Here is an example of how the PC is moving "away'" from parallel to serial interfaces. Early generations have been apart of the parallel design that allows multiple bits sent simultaneously over several pins in parallel. The faster the bits are sent the better, but the timing of signals must be the same. This becomes more difficult with faster and longer connections.
A serial bus design is much simpler, sending 1 bit at a time over a single wire at much higher rates than parallel. By combining multiple serial data paths, even faster speeds can be realized that dramatically exceed the capabilities of traditional parallel buses.
Some key differences between a Serial and Parallel Adder are that a Serial Adder is slower, a Parallel adder is a combinational circuit and the time required for addition depends on the number of bits in a Serial, but not a Parallel. A Serial Adder is a sequential circuit while a Parallel is a combinational circuit.
give the difference between serial port and parallel port
series and parallel are different types of circuits that a robot can contain
a serial port sends and recieves one bit after another, a parallel port sends more bits at the same moment
A parallel port can transfer 8 bits at a time, while a serial port can only transfer one bit at a time.
In serial port : The Data flows continuously and In Parallel Port : The Data is transported as a pack. Hence for large data to be printed it is always preferable to use the serial port rather than the Parallel port.
In serial bus, the bits of data are transferred one at a time (one after another). In parallel bus, they are transferred simultaneously (all at once).
A serial wire can be used for several uses. Mainly, it's used for basic communication between different devices. The main advantage is the fact that serial communication can use only three wires. Parallel requires several more, typically eight, or sixteen, plus signalling, and traditionally is faster. But for simple communication between devices, which could be computers or other devices, serial communication can simplify things. Serial communication can also be used for great distances. The telegraph was serial communication. Hence "AT&T"!
SCSI uses a parellel communication chain and SAS uses serial Point to Point communication
Parallel processing processes more than one function simultaneously, serial processing processes functions one at a time in the order they are received.
SERIAL AND PARALLEL COMUNICATION MEANS THE METHOD USED FOR COMMUNICATION.IN SERIAL COMMUNICATION THE DATA THAT IS TO BE COMMUNICATED IS PASSED SERIALLY THAT IS ONE BY ONE.IN PARALLEL COMUNICATION THE DATAS ARE PASSED PARALLEL. SERIAL AND PARALLEL COMUNICATION MEANS THE METHOD USED FOR COMMUNICATION.IN SERIAL COMMUNICATION THE DATA THAT IS TO BE COMMUNICATED IS PASSED SERIALLY THAT IS ONE BY ONE.IN PARALLEL COMUNICATION THE DATAS ARE PASSED PARALLEL.
A serial hard drive is the same as a SATA hard drive. SATA is Serial ATA, and PATA is Parallel ATA.
Parallel ports are easy to program and faster compared to the serial ports. But main disadvantage is it needs more number of transmission lines. Because of this reason parallel ports are not used in long distance communications. Let us know the basic difference between working of parallel port and serial port. In serial ports, there will be two data lines: One transmission and one receive line. To send a data in serial port, it has to be sent one bit after another with some extra bits like start bit, stop bit and parity bit to detect errors. But in parallel port, all the 8 bits of a byte will be sent to the port at a time and a indication will be sent in another line. There will be some data lines, some control and some handshaking lines in parallel port. If three bytes of data 01000101 10011100 10110011 is to be sent to the port, parallel port communication is faster then serial port.Most parallel ports are a DB25 pin female, while most serial ports are DB9 pin male.Both serial and parallel ports can be used for printer, but parallel is by far the most common. The most common use for serial is modem or communication to a device.Both use IRQ resources. Parallel use LPT ports in the Operating System, while Serial uses COM ports.
Serial data byte transfers move the data one bit at a time; parallel data byte transfers move all the data bits at the same time.
serial no. are in a seres so the signal travels in a series one by one. But in parallel signals the signal travel paralerly direction they can be in a direction or in opossite so no. of signals can be pass simultaneously
one bit at a time vs. a group of several bits at a time.
Serial printers are connected via the serial (COM) port of the computer. "Non-serial" printers are connected through another interface, such as the parallel port, USB, ADB. FireWire, etc...
LapLink is a talker/listener application for transferring information between two computers. Serial port to the serial port or parallel port to parallel port communication is established between the two computers. One is set up as a talker and the other is set up as a listener.
usb has got 4 pins & serial port has 25 pins
1.serial adder add bits serially but parallel adder add bits at the same time . 2.serial adder depends on previous outputs but parallel adder does not depends on previous outputs . 3.parallel adder takes less time to execute compared to serial adder.
SATA is serial advanced technology attachment, and the data is transferred serially. PATA is parallel advanced technology attachment and the data employs parallel transmission.