What is a network control?
network flow control is a means of communication networks for management of transport overload in the network. Different techniques can be used for networks based on circuit and packet switching networks such as the forces used on the Internet. Through the flow control techniques, the network is able to provide better overall quality of services and reduce the frequency of the released communication.
circuits, such as multiplexing network time resolution for certain types of digital communication, usually use reserved circuits for communication. In these cases, the network may miss using all its available bandwidth channels. If the channel sits idle, while other traffic is waiting for transmission, the network control techniques can be implemented to balance the field of available communication circuits.
With such networks of circuits, a technician known as CAC (CAC) is used to properly control the network. Algorithms are used to observe the network and decide whether to use available sources. AlgorithmsIn general, they operate in such a way as to allow the use of the circuit depending on the evaluation of certain variables, such as the type of service, the quality of the service to be met, and other transport information such as top rates and sustainable rates. One disadvantage is that some CAC methods also prefer available circuits, reserving some circuits for occasional high -priority connections that beat the purpose, because these circuits remain idle if there is no high priority communication.
with network networks with packet switching can be implemented by a number of possible net control techniques depending on the type of network or available software or hardware. In most cases, the network of packet switching will use some type of buffer, which is storage for data packets, as accepted from the sender. Packets go to upThe recipient's memory and the applicant's application will pull them out for use. If sending transmission is faster than the ability of the receiving end to process data from the buffer, it can fill in quickly.
In the TCP protocol networks (TCP) can be controlled by a network of networks with technology known about windows. The three -way handshaking, which takes place during TCP connection, allows you to transmit information about the size of the recipient window. In this way, the recipient can let the sender know how much leveling room is available so that the sender can avoid sending too much data.
Recommended Standard 232 (RS-232) The telecommunications item also discusses the provisions of the network control in serialized networks. With RS-232, it is divided into a software solution or a hardware solution. The software technique is also KNOWN OF AS XON-XOFF Control Flow Control, where the recipient Xon is sent to the recipient who claims to be able to receive data, and XOFF when it has a full buffer. Errors can occurErrors, if the communication signal is bad, while the sender does not have to correctly receive the XOFF signal and continue to push packets on the recipient. The flow control signals are also sent on the same channel as data communication that uses a small amount of bandwidth.
Thehardware control of the network flow, on the other hand, is much more reliable to the added cost of implementing other physical lines. In this case, separate transmission control lines are set: one is called a row (RTS) line and the other is a clear shipping line (CTS). Sending the end announces its intention to transmit via the RTS line and the recipient announces its ability to receive through the CTS line.