Learn a comprehensive, step‑by‑step guide to testing network performance on Linux, covering beginner commands like ping, download speed checks with curl/wget, advanced utilities such as speedtest‑cli, iperf3, iftop, nload, nethogs, bmon and vnstat, plus installation tips, usage examples, and practical advice for different scenarios.
Performance is critical for mobile apps; this guide outlines how to evaluate device, server/API, and network performance, provides troubleshooting steps for common issues, recommends Android and iOS testing tools, discusses testing challenges, and presents a comprehensive pre‑release testing checklist.
This guide walks you through a complete set of Linux network‑speed testing utilities—from the built‑in ping command to curl/wget downloads, Speedtest‑CLI, iperf3, iftop, nload, nethogs, bmon and vnstat—explaining installation, core metrics, usage examples, and practical tips for accurate measurement and troubleshooting.
This article explains the core principles of TCP's retransmission mechanisms, outlines four common strategies, discusses how high retransmission rates indicate network or server issues, and provides practical methods for test engineers to diagnose, monitor, and optimize TCP reliability in performance testing scenarios.
FunProxy is a Rust‑based, Tauri‑powered cross‑platform tool that provides high‑performance packet capture, cloud‑managed hosts and rules, collaborative sharing, and extensible plugins for full‑link testing and proxying across Windows, macOS, Linux, Android, iOS and web, delivering secure, low‑memory, fast startup testing.
This guide shows three practical ways to verify UDP port connectivity on Windows 10: installing and using Netcat (nc), writing a simple PowerShell script, and leveraging the ping command for basic reachability checks, along with installation tips and important caveats.
This article explains how packet loss in TCP/IP networks triggers retransmissions that dramatically increase HTTP latency, reduce throughput, and cause cascading failures, then details an experiment using ChaosMesh to quantify these effects across different payload sizes and loss rates, and offers practical testing guidelines.
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.
This guide explains how to install iPerf on Linux, macOS, and Windows, shows basic server‑client usage, details advanced command‑line options, and provides practical examples for measuring TCP and UDP bandwidth performance.
This guide explains how to install iPerf on Linux, macOS, and Windows, start the server and client, use basic and advanced command‑line options, and run example tests to measure TCP and UDP bandwidth, providing practical tips for accurate network performance diagnostics.
This guide explains how to prepare source and target servers, install iPerf, run it in server and client modes on Windows (or Linux), and use specific commands to measure TCP bandwidth, UDP jitter, packet loss, and network latency, including required firewall and security‑group settings.
This guide walks you through preparing the environment, installing iPerf on Windows or Linux servers, running it in server and client modes, testing TCP and UDP performance, measuring latency with ping, and checking all available options to ensure reliable network bandwidth and latency measurements.
This guide explains how to measure local network speed on Linux, Windows, and macOS using command‑line tools like speedtest-cli and iPerf, graphical apps, PowerShell, Wireshark, and provides advanced tips for optimization and monitoring.
This guide explains how to measure local network performance on Linux, Windows, and macOS using free command‑line utilities such as speedtest‑cli and iperf, as well as graphical tools like Speedtest, and provides advanced techniques with Wireshark, ping, and network‑optimization tips.
This guide introduces the powerful Netcat (nc) tool, covering installation on CentOS, core syntax and options, practical examples for TCP/UDP port testing, file and directory transfer between servers, and a method to benchmark network throughput using /dev/zero and dstat.
This guide explains how to install iperf on Windows and Linux, configure it for TCP and UDP bandwidth testing, adjust UDP buffer settings, and interpret the resulting performance metrics, providing practical command examples and visual output for accurate network performance analysis.
This guide explains what UDP is, when UDP Ping is useful, and provides step‑by‑step Linux commands using nping and hping3 to test UDP connectivity and diagnose network latency or packet loss.
This article introduces the open‑source traffic‑replay tool TCPCopy, explains its 1.0 architecture—including the tcpcopy and intercept components—covers its packet‑capture and injection methods (raw socket vs pcap), TCP state handling, routing challenges, intercept role, and performance characteristics, providing practical insights for backend testing and operations.
This article introduces mitmproxy, explains its proxy modes and MITM operation, and demonstrates how to use Python scripts with mitmproxy to automate multi‑field validation and encryption handling in mobile advertising testing, offering a flexible alternative to traditional capture tools.
This guide explains how to install the ncat package on CentOS 7/8, use it to check TCP connections, set up listening ports, run a basic chat service, probe SSH versions, create a backdoor, and serve static web pages, providing concrete commands and example outputs for each task.
The authors upgraded the Mahimahi record‑and‑replay framework by replacing Apache with modular Nginx, adding native HTTP/2 support and integrating a QUIC module (via quiche), enabling replay of captured traffic under modern protocols, precise network condition control and open‑sourcing the extensions for reproducible performance experiments.
The article explains how experienced Java or JavaScript developers can quickly adopt Python to create a concise, cross‑platform script that tests LAN connectivity across a range of IP addresses, highlighting Python's simplicity compared to Java's more involved compilation and execution steps.
This article walks through setting up a lab environment with ESXi, H3C VSR, and CentOS hosts, installing iperf, netperf, and qperf, configuring IP addresses and routes, disabling firewalls, and using these tools to measure bandwidth, latency, jitter, and packet loss, revealing surprising high‑throughput results and practical troubleshooting tips.
This step‑by‑step tutorial shows how to configure Linux kernel limits, set up multiple client IPs, and run PHP‑based server and client scripts to achieve and monitor over one million concurrent TCP connections on a single machine.
This guide shows how to use curl's --resolve option to force a specific IP address for a domain during HTTP or HTTPS requests, avoiding hosts file changes, DNS cache flushing, and the need to edit system configurations.
This guide explains how to install and use three command‑line tools—fast, speedtest, and iPerf—on Linux (or any OS) to measure download and upload bandwidth, retrieve detailed results, and automate regular network performance monitoring.
This guide explains how to use the lightweight netcat utility for a wide range of network tasks—including checking versions, testing TCP and UDP ports, transferring files, measuring bandwidth, and even creating simple backdoors—while providing concrete command examples and practical tips for Linux environments.
This guide explains how to use Netcat—a tiny, versatile TCP/UDP utility—to test ports, transfer files, measure bandwidth, and even create simple backdoors, covering both GNU and OpenBSD versions with concrete command examples for Linux and Windows environments.
This guide explains how to use Netcat—a lightweight, versatile TCP/UDP utility installed on most Linux distributions—for port scanning, connectivity checks, UDP sessions, file transfers, bandwidth measurement, and even creating simple backdoors, while highlighting differences between GNU and OpenBSD versions.
This technical report presents an IPv6 adoption overview, global deployment status, operating‑system and application IPv6 support, and a series of DNS and network‑stack tests—including dual‑stack scenarios, code examples, and conclusions on best practices such as using getaddrinfo over gethostbyname.
tcpcopy is a request‑copy tool that captures live traffic from production servers and replays it on test machines, enabling functional and stress testing without affecting users, and the guide covers its architecture, workflow, installation, configuration, and both online and offline usage modes.
This article presents a detailed collection of black‑box testing methods for mobile applications, covering installation, launch, uninstall, network conditions, input validation, compatibility, storage, upgrade, UI friendliness, screen rotation, interruption, resource conflicts, and multi‑touch scenarios.
This article presents a comprehensive collection of practical black‑box testing techniques for mobile applications, covering installation, launch, network conditions, input validation, compatibility, storage, interruption handling, upgrades, UI friendliness, screen rotation, and multi‑touch scenarios.
This guide explains why traditional Speedtest.net requires a graphical interface, introduces the command‑line tool speedtest‑cli, and provides step‑by‑step instructions for installing it on Linux, running basic tests, sharing results, listing servers, and selecting specific servers for precise bandwidth measurements.
This article introduces a customized Fiddler plugin that enhances mobile app testing by analyzing packet size, request latency, frequency, coverage, and simulating various network speeds, helping QA teams detect backend interface anomalies and improve test completeness.
