Table of Contents
- 1 Why flow control and error control at the transport layer as we have it at the data link layer?
- 2 Why do we need both link layer and end to end transport layer reliability?
- 3 Which type of protocol uses both flow control and error control?
- 4 How flow control and error control issues are handled in TCP protocol?
- 5 Why the flow and error control mechanism are available on DLL & transport layer both?
- 6 Why we need error control at the transport layer?
- 7 What is error control in transport layer?
- 8 How does the data link layer control the errors?
- 9 What is the difference between the data link layer and transport layer?
Why flow control and error control at the transport layer as we have it at the data link layer?
Flow control in transport layer ensures the delivery of the message globally, as the two points of connection over this protocol are logically connected. Whereas in data-link layer, the concern is to deliver message locally, as the two points of connection over this protocol are physically connected.
Why do we need both link layer and end to end transport layer reliability?
3 Answers. End-to-end is required because not ALL network layers are particularly reliable, and only the end systems know how much reliability is really required. When a link-layer protocol provides reliable delivery, it guarantees to move each network layer data-gram across the link without any error.
Which type of protocol uses both flow control and error control?
74. The Simplest Protocol and the Stop-and-Wait Protocol are for ______ channels. 75. The ____ Protocol has neither flow nor error control….Online Test.
| 77. | The _______Protocol has both flow control and error control. |
|---|---|
| b. | Go-Back-N ARQ |
| c. | Selective-Repeat ARQ |
| d. | both (b) and (c) |
Which layer is responsible for flow control and error connection?
data link layer
The data link layer is further divided into two sublayers: The Logical Link Control (LLC) sublayer is responsible for flow controls and error controls that ensure error-free and accurate data transmission between the network nodes.
Why is flow control needed in transport layer?
Flow control is used to prevent the sender from overwhelming the receiver. If the receiver is overloaded with too much data, then the receiver discards the packets and asking for the retransmission of packets. This increases network congestion and thus, reducing the system performance.
How flow control and error control issues are handled in TCP protocol?
TCP uses an end-to-end flow control protocol to avoid having the sender send data too fast for the TCP receiver. It uses sliding window protocol for this. In each TCP segment, the receiver specifies in the receive window field the amount of additionally received data that it is willing to buffer for the connection.
Why the flow and error control mechanism are available on DLL & transport layer both?
In data link layer , there is a node to node communication. so we need flow and error control to manage the packet ordering by using stop and wait ARQ, selective repeat ARQ,etc.
Why we need error control at the transport layer?
Error control at the data link layer checks for errors at every hop on the route from source to destination. It is necessary to do it in order to discard any corrupted packet early at a hop avoiding the need to route a corrupted packet all the way to destination.
Why is error control needed in data communications?
Error control in data link layer is the process of detecting and correcting data frames that have been corrupted or lost during transmission. In case of lost or corrupted frames, the receiver does not receive the correct data-frame and sender is ignorant about the loss.
How does transport layer support flow control?
The transport layer is responsible for flow control. It uses the sliding window protocol that makes the data transmission more efficient as well as it controls the flow of data so that the receiver does not become overwhelmed. Sliding window protocol is byte oriented rather than frame oriented.
What is error control in transport layer?
TCP is a reliable transport layer protocol. Error control includes mechanisms for detecting corrupted segments, lost segments, out-of-order segments, and duplicated segments. Error control also includes a mechanism for correcting errors after they are detected.
How does the data link layer control the errors?
The errors between the nodes can be detected by the data link layer control, but the error at the node (between input port and output port) of the node cannot be detected by the data link layer. Many features of the transport layer (e.g. flow control and reliable delivery) are also handled by the data link layer.
What is the difference between the data link layer and transport layer?
The error control in the data link layer, works at the packet or stream level, while the error control in the transport layer, works at the message level. The data link layer is not concerned with ordering of packets, while the transport layer is.
Why is error checking provided in the transport layer?
Error checking is provided in the transport layer mainly because of the following two reasons: Even if no errors are introduced when a segment is moving over a link, it’s possible for errors to be introduced when a segment is stored in a router’s memory (for queuing). Also asked, what is error control in transport layer?
What is the difference between flow control in transport layer?
Flow control in transport layer ensures the delivery of the message globally, as the two points of connection over this protocol are logically connected. Whereas in data-link layer, the concern is to deliver message locally, as the two points of connection over this protocol are physically connected.