ccna 200 301 bookstore movers arlington

ccna 200 301 bookstore movers arlington.The whole uses an acknowledgement mechanism.follows the use of flow control.Figure 2.10 Segmented data transmission under flow controlThe types of flow control mechanisms are divided into: caching, sliding window, and congestion avoidance.Sliding WindowsIdeally, the transfer of data is fast and efficient. You must be able to imagine that if the sender device had to wait for an acknowledgement after sending each data segment, the transmission speed would certainly be reduced. But because there is such a small amount of time after the sender transmits a data segment and before it finishes processing the acknowledgment, the sender device takes this opportunity to transmit more data. The number of data segments that the transmitting device is able to send before receiving an acknowledgement is called a "Window" (Window).The window is responsible for controlling the number of unacknowledged data segments.The size of the window controls the amount of information that is transmitted from one end to the other. Some protocols measure in the number of packets, and TCP/IP measures in the number of bytes.You can see two window sizes in Figure 2.11 ---------- set to 1, and another set to 3.When you configure the window size to 1, the sender device needs to wait for an acknowledgement message after each data segment is sent before it can send another data segment. If you configure the window size to 3, the sender device is able to send three data segments before receiving an acknowledgment message.