Pronunciation: [ˈɑːk] (IPA) 
ARQ is a four-letter word that is often used in the field of telecommunications. Its spelling, as per the International Phonetic Alphabet (IPA), is [ɑɹkjʊ]. The first letter, "A," is pronounced as the "a" in "father," followed by "R" which is pronounced as the "r" in "red." The third letter, "Q," is pronounced as the "k" sound followed by a "yoo" sound. Overall, the spelling of ARQ is distinctive and phonetically accurate.
ARQ, which stands for Automatic Repeat reQuest, is a protocol used in data communication and networking to ensure reliable transmission of data between sender and receiver. It is a method that enables the receiver to detect if errors occur during the transmission and requests the sender to retransmit the corrupted or lost data packets.
When transmitting data, ARQ divides the data into smaller units called packets. These packets are sent from the sender to the receiver, where the receiver acknowledges their successful receipt. If the receiver encounters errors in the received packet, it sends a negative acknowledgment (NACK) to the sender, requesting it to retransmit the faulty packet. The sender then retransmits the packet until the receiver acknowledges its successful receipt or until a maximum number of retransmission attempts is reached.
There are various methods of ARQ, including Stop-and-Wait ARQ, Go-Back-N ARQ, and Selective Repeat ARQ. Each method has its own advantages and disadvantages based on factors such as error detection capabilities, speed, delay, and efficiency.
ARQ is widely used in modern communication systems and networks, including wireless networks, internet protocols, and telecommunications. It helps ensure accurate and reliable transmission of data by detecting and correcting errors that occur during the transmission process, consequently enhancing the overall quality and performance of the communication system.
