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network simulation

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Efficient Ops
Efficient Ops
Apr 6, 2025 · Operations

Simulate Unreliable Networks on Windows with the Free Clumsy Tool

This guide explains how the open‑source Windows utility Clumsy can intercept and manipulate network packets—adding delay, loss, throttling, duplication or reordering—to let developers and operations engineers test application resilience under adverse network conditions.

Clumsynetwork simulationnetwork testing
0 likes · 6 min read
Simulate Unreliable Networks on Windows with the Free Clumsy Tool
Bilibili Tech
Bilibili Tech
Jan 2, 2024 · Frontend Development

WebRTC Testing and Quality Assurance for Live Streaming

Bilibili’s senior test engineer outlines a comprehensive WebRTC quality‑assurance strategy that validates client SDK modules, signaling and media servers, conducts functional, regression and weak‑network testing, monitors performance metrics on both client and server, and correlates QoS data with user‑centric QoE indicators to ensure seamless live‑streaming experiences.

Live StreamingTestingWebRTC
0 likes · 17 min read
WebRTC Testing and Quality Assurance for Live Streaming
Efficient Ops
Efficient Ops
Jun 21, 2020 · Operations

How to Simulate Real-World Network Conditions with Linux Netem and tc

This guide explains how to use Linux's Netem module via the tc command to emulate network conditions such as delay, loss, duplication, corruption, and packet reordering, providing practical examples and command syntax for effective testing and troubleshooting of network performance issues.

LinuxNetemnetwork simulation
0 likes · 8 min read
How to Simulate Real-World Network Conditions with Linux Netem and tc
FunTester
FunTester
Apr 7, 2020 · Operations

How to Simulate Different Network Speeds for Mobile Apps and Websites Using JMeter

This article explains how to use JMeter to limit output bandwidth by configuring httpclient.socket.http.cps and httpclient.socket.https.cps, enabling realistic simulation of various mobile network speeds such as GPRS, 3G, 4G, Wi‑Fi, and Ethernet, and shows how to apply these settings via user.properties or command‑line parameters.

JMeterload testingmobile testing
0 likes · 5 min read
How to Simulate Different Network Speeds for Mobile Apps and Websites Using JMeter
iQIYI Technical Product Team
iQIYI Technical Product Team
Nov 15, 2019 · Operations

QTC: A Dynamic Network Simulation and Low‑Interference Packet Capture Solution for Mobile Video App Testing

QTC, iQIYI’s extended ATC tool combining a dual‑NIC workstation, wireless hotspot and Python‑based software, dynamically simulates static and changing network conditions while providing low‑interference automated packet capture, enabling rapid mobile video app testing across diverse scenarios and uncovering numerous bugs.

QTCVideo Streamingautomation
0 likes · 9 min read
QTC: A Dynamic Network Simulation and Low‑Interference Packet Capture Solution for Mobile Video App Testing
DevOps Cloud Academy
DevOps Cloud Academy
Aug 9, 2019 · Operations

Setting Up a Lab Environment: Installing GNS3 and CRT Terminal

This guide walks through the step‑by‑step process of preparing a lab environment by installing GNS3, configuring it to use Chinese language, selecting a remote connection tool, and loading ISO images, with accompanying screenshots to illustrate each configuration stage.

CRT terminalGNS3Tutorial
0 likes · 1 min read
Setting Up a Lab Environment: Installing GNS3 and CRT Terminal
360 Quality & Efficiency
360 Quality & Efficiency
Nov 9, 2018 · Mobile Development

Weak Network Testing: Concepts, Requirements, Impact, and Common Tools

This article explains what weak network testing is, why it matters for mobile applications, its impact on user experience and bug rates, and introduces common tools and step‑by‑step procedures for simulating low‑bandwidth, high‑latency, and packet‑loss conditions.

CharlesFiddlerapp robustness
0 likes · 5 min read
Weak Network Testing: Concepts, Requirements, Impact, and Common Tools
Baidu Intelligent Testing
Baidu Intelligent Testing
Aug 23, 2018 · Backend Development

Simulating HTTP Response Codes and Network Faults for Testing

This article explains how to construct various HTTP response codes using a PHP script and how to emulate network anomalies such as TCP resets, packet loss, and latency with iptables and tc netem, providing practical techniques for robust backend testing.

HTTPNetemPHP
0 likes · 7 min read
Simulating HTTP Response Codes and Network Faults for Testing