---
title: "What is congestion control ?"  
description: "What is congestion control ?"  
author: "Prakash nidhi Verma"  
published: 2018-06-11  
updated: 2020-09-21  
canonical: https://www.mindstick.com/interview/23420/what-is-congestion-control  
category: "security in .net"  
tags: ["security", "database security", "network"]  
reading_time: 2 minutes  

---

# What is congestion control ?

In TCP/IP networking when a network nodes carrying high data than system handle the network through **Congestion**. It's typical effects include queuing delay, packet loss or the blocking of new connections.

![What is congestion control 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Congestion can be resolved by reducing the speed of packets arriving(not to be confused with flow control).

Congestion is a problem that occurs on shared networks when multiple users contend for access to the same resources (bandwidth, buffers, and queues).

Techniques to control congestion:

1- End-system flow control

2- Network congestion control

3- Resource allocation

4- Network-based congestion avoidance

## Happy Coding :)

## Answers

### Answer by Prakash nidhi Verma

In TCP/IP networking when a network nodes carrying high data than system handle the network through **Congestion**. It's typical effects include queuing delay, packet loss or the blocking of new connections.

![What is congestion control ?](data:image/jpeg;base64,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Congestion can be resolved by reducing the speed of packets arriving(not to be confused with flow control).

Congestion is a problem that occurs on shared networks when multiple users contend for access to the same resources (bandwidth, buffers, and queues).

Techniques to control congestion:

1- End-system flow control

2- Network congestion control

3- Resource allocation

4- Network-based congestion avoidance

## Happy Coding :)


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Original Source: https://www.mindstick.com/interview/23420/what-is-congestion-control

Copyright © MindStick Software Pvt. Ltd. This Markdown version is provided for developers, AI systems, and offline reading.
