Tag: congestion

TCP Reliable 2

Posted on by lechuck park

From Claude with some prompting
This image illustrates the flow control and congestion control mechanisms, which are examples of why TCP (Transmission Control Protocol) is considered a reliable protocol.

  1. TCP is a protocol that employs various mechanisms to ensure reliable data transmission.
  2. Flow Control:
    • It uses sequence numbers and acknowledgments to regulate the amount of data transmitted based on the receiver’s buffer size, preventing data loss.
    • This mechanism contributes to TCP’s reliable delivery guarantee.
  3. Congestion Control:
    • It detects network congestion and adjusts the transmission rate to avoid further congestion.
    • This allows TCP to provide stable and efficient data transfer.

Therefore, flow control and congestion control are key factors that enable TCP to be regarded as a reliable transport protocol. Through these mechanisms, TCP prevents data loss, network overload, and ensures stable communication.


MTU & MSS

Posted on by lechuck park

From Copilot with some prompting
Certainly! Let’s clarify the distinct purposes of MTU (Maximum Transfer Unit) and MSS (Maximum Segment Size):

  1. MTU (Maximum Transfer Unit):
    • Associated with Ethernet, MTU represents the maximum size of an Ethernet frame.
    • When data is transmitted over a network, it is divided into smaller packets (frames). MTU defines the largest size a frame can be.
    • If a frame exceeds the MTU, it will be fragmented by the outgoing network device.
    • MTU optimization aims to efficiently share network bandwidth.
  2. MSS (Maximum Segment Size):
    • Associated with TCP (Transmission Control Protocol), MSS controls the flow of data within a TCP session.
    • It specifies the largest amount of data that can be sent in a single TCP segment.
    • The sender determines how many MSS units are sent at a given time.
    • MSS plays a crucial role in TCP congestion control and affects the TCP window size.

In summary, MTU focuses on frame size in the Ethernet layer, while MSS governs data segmentation and flow control in the TCP layer.