Contents
- 1 What is automatic repeat request ARQ explain?
- 2 What is an ARQ automatic repeat request protocol used for what type of ARQ protocol is used in TCP?
- 3 What is the Speciality for selective repeat ARQ?
- 4 What is difference between selective and go back ARQ?
- 5 At what layer does TCP exist?
- 6 What is the difference between go back n and selective repeat?
- 7 Why is go back N ARQ better than Selective Repeat ARQ?
- 8 In what way Selective Repeat is better than go back N ARQ technique?
- 9 Where is the Automatic Repeat reQuest ( ARQ ) protocol located?
- 10 What do you mean by automatic repeat request?
- 11 What happens if there is a timeout on an ARQ request?
What is automatic repeat request ARQ explain?
Automatic repeat request (ARQ), also known as automatic repeat query, is an error-control method for data transmission that uses acknowledgements (messages sent by the receiver indicating that it has correctly received a packet) and timeouts (specified periods of time allowed to elapse before an acknowledgment is to be …
What is an ARQ automatic repeat request protocol used for what type of ARQ protocol is used in TCP?
ARQ protocols reside in the Data Link or Transport layers of the OSI model. TCP uses a variant of Go-Back-N ARQ to ensure reliable data transmission over the Internet protocol. However, it does not guarantee delivery of data packets. If TCP uses Selective Acknowledgement (SACK), Selective Repeat ARQ is used.
What is automatic repeat request strategy and its application Explain go back and selective repeat ARQ?
ARQ stands for Automatic Repeat Request also known as Automatic Repeat Query. ARQ is an error-control strategy used in a two-way communication system. It is a group of error-control protocols to achieve reliable data transmission over an unreliable source or service.
What is the Speciality for selective repeat ARQ?
Selective Repeat is part of the automatic repeat request (ARQ). With selective repeat, the sender sends a number of frames specified by a window size even without the need to wait for individual ACK from the receiver as in Go-Back-N ARQ. The sender individually retransmits frames that have timed out.
What is difference between selective and go back ARQ?
The main difference between these two protocols is that after finding the suspect or damage in sent frames go-back-n protocol re-transmits all the frames whereas selective repeat protocol re-transmits only that frame which is damaged.
What does ARQ stand for?
ARQ
| Acronym | Definition |
|---|---|
| ARQ | Automatic Request for Repetition |
| ARQ | Automatic Repeat Queuing |
| ARQ | Automatic Retransmission on Request |
| ARQ | Automated Response to Query |
At what layer does TCP exist?
TCP/IP Protocol Architecture Model
| OSI Ref. Layer No. | OSI Layer Equivalent | TCP/IP Protocol Examples |
|---|---|---|
| 4 | Transport | TCP, UDP |
| 3 | Network | IP, ARP, ICMP |
| 2 | Data link | PPP, IEEE 802.2 |
| 1 | Physical | Ethernet (IEEE 802.3) Token Ring, RS-232, others |
What is the difference between go back n and selective repeat?
What is the difference between stop and wait & stop and wait automatic repeat request ARQ )?
In Selective Repeat protocol, Acknowledgement type is individual. In Stop and Wait protocol, no specific order is needed at receiver end. In GoBackN protocol, in-order delivery only are accepted at receiver end. In Selective Repeat protocol, out-of-order deliveries also can be accepted at receiver end.
Why is go back N ARQ better than Selective Repeat ARQ?
Go back N and Selective Repeat gives better efficiency than Stop and Wait ARQ. Buffer requirement in Selective Repeat is very large. If the system does not have lots of memory, then it is better to choose Go back N. Selective Repeat requires large number of bits in sequence number field.
In what way Selective Repeat is better than go back N ARQ technique?
In Go-Back-N if a sent frame is found suspected or damaged then all the frames are retransmitted till the last packet. In Selective Repeat, only the suspected or damaged frames are retransmitted. Go-Back-N is easier to implement. In Selective Repeat, receiver window needs to sort the frames.
In what way Selective Repeat is better than Go-Back-N?
Where is the Automatic Repeat reQuest ( ARQ ) protocol located?
Computer Engineering Computer Network MCA Automatic Repeat ReQuest (ARQ) is a group of error – control protocols for transmission of data over noisy or unreliable communication network. These protocols reside in the Data Link Layer and in the Transport Layer of the OSI (Open Systems Interconnection) reference model.
What do you mean by automatic repeat request?
Automatic repeat request ( ARQ ), also known as automatic repeat query, is an error-control method for data transmission that uses acknowledgements (messages sent by the receiver indicating that it has correctly received a packet) and timeouts (specified periods of time allowed to elapse before an acknowledgment…
What does ARQ stand for in Computer Science?
Last Updated : 08 Jun, 2021 ARQ stands for Automatic Repeat Request also known as Automatic Repeat Query. ARQ is an error-control strategy used in a two-way communication system. It is a group of error-control protocols to achieve reliable data transmission over an unreliable source or service.
What happens if there is a timeout on an ARQ request?
If a timeout occurs: the sender does not receive the acknowledgement before the specified time, it is implied that the frame or packet has been corrupt or lost during the transmission. Accordingly, the sender retransmits the packet and these protocols ensure that this process is repeated until the correct packet is transmitted.