How to check your internet speed and diagnose network issues

Running a proper speed check helps separate a weak Wi-Fi signal from a genuine broadband fault. A speed result is only one measurement: latency, jitter, packet loss and performance during busy hours can matter more for video calls, online games and cloud backups. Learn more about иммерсионное охлаждение для майнинга в условиях высокой запыленности.

Australian homes often rely on an NBN service delivered over fibre, copper, hybrid fibre, fixed wireless or satellite. Availability and line technology differ across Sydney, Melbourne, Brisbane, Perth, Adelaide and regional towns, while Telstra, Optus, TPG and iiNet sell many of the popular fixed-line plans.

Run tests from both a laptop and a phone, compare wired and wireless results, and check local equipment before contacting an internet service provider. A short record of each result makes support faster and clarifies whether the fault belongs to the device, home network, NBN infrastructure or provider.

Run a reliable speed test

Use a reputable browser-based test such as Ookla Speedtest and run it several times rather than relying on a single number. When available, select a nearby Australian server; keep the same server for later comparisons. Test at different times, including the evening period when household internet demand is usually higher.

For the cleanest baseline, connect a computer directly to the modem or router with Ethernet, pause downloads and cloud syncing, and close video streams. A phone's speed test is useful for mapping coverage, but cellular results can reflect mobile network congestion rather than your fixed broadband.

Record download speed, upload speed, ping and jitter in Mbps or milliseconds. Compare them with the speed tier on your bill, then compare results across wired and Wi-Fi devices. If bandwidth is healthy but calls still stutter, investigate latency and packet loss rather than assuming the plan is too small.

Separate Wi-Fi from line problems

Start with a controlled comparison. Connect one computer by Ethernet and run the same speed test, then repeat over Wi-Fi on that computer and another device. Wired performance that is much faster points to Wi-Fi range, interference or congestion; similar poor results on every wired device point toward the line or provider.

On Windows 10 or 11, open Network Connections, check that the adapter is connected and note any error such as media disconnected or limited connectivity. Disable a temporary VPN or proxy, then use Windows' built-in Network Troubleshooter if the adapter reports a problem. Restarting the computer clears many transient driver and stack faults.

Use ping 1.1.1.1 -n 20 to check replies and tracert 1.1.1.1 to trace the route. Large delays, missing replies or a stalled final hop reveal where the path breaks. If addresses resolve but web pages fail, try nslookup google.com; a DNS error may require a DNS reset or a corrected address supplied by the provider.

Inspect your router and Wi-Fi setup

Router placement often explains poor results. Keep the unit open, elevated and away from metal cabinets, television cabinets and thick masonry. The 2.4 GHz band travels farther but supports fewer devices, while 5 GHz offers faster throughput over a shorter distance. Start with the 5 GHz band near the main work area and use 2.4 GHz farther away.

Reboot the modem and router, then check that the broadband sync light is steady. Update router firmware through its official administration page, and compare the Wi-Fi password and channel settings with nearby networks. If changing a setting does not restore service, restore the original configuration rather than leaving a half-finished setup.

Heat and dust can also shorten the life of networking hardware. A router kept in a hot roof space or dusty workshop may throttle or fail, and immersion cooling for mining illustrates the value of environmental protection for electronics in demanding sites. Improve airflow around the equipment and replace damaged cables or ageing power supplies.

Check local network load and Windows activity

Household bandwidth is shared. Australian homes commonly stream Foxtel or other services while children play online games, adults join video meetings and someone starts a cloud backup. These habits can saturate an otherwise healthy connection, especially during school nights and remote-work hours. Pause non-essential transfers and repeat the test to see whether throughput changes.

Open the router's connected-device list to find active equipment, then watch live network usage on a Windows PC through Task Manager or Resource Monitor. Automatic Windows updates, OneDrive syncing, video calls and unrecognised streaming devices can consume significant upload and download capacity. Remember that a fast internet test does not prevent one application from monopolising the line.

Treat a sudden unexplained slowdown as a security question as well as a performance issue. Run a Microsoft Defender Quick Scan, review newly installed programs and browser extensions, and disconnect the PC if you suspect ransomware. A compromised machine can generate malicious traffic, while a failing drive or overloaded processor can make speed-test pages appear unreliable.

Test the ISP service and NBN connection

Check the provider's outage map and NBN status information before arranging a technician. A green modem light, correct login and a successful test on another device support a local-network fault; repeated sync errors, flashing loss-of-light indicators or an area-wide outage point elsewhere. NBN fixed wireless and satellite services can also vary with location and weather, so compare service alerts with the technology in your area.

Call the provider with your account details, modem or NBN Network Unit serial number, MAC address, error lights and test results. Ask whether an engineer is attending and whether your line has been flagged after previous dropouts. Do not reset the NBN unit to factory settings unless the provider requests it, because doing so may remove useful configuration and obscure the fault.

Test a phone on mobile data during a period of poor broadband. If mobile service works while the fixed line does not, the evidence is clearer for the provider, although it does not identify the exact fault. Under the Australian Consumer Law, broadband services can carry guarantees such as due care and skill and reasonable time for service. If the provider will not resolve an eligible complaint, use its internal process, then consider ACMA or the Telecommunications Industry Ombudsman.

Escalate with evidence and protect performance

Create a concise troubleshooting log with the date, time, location, device, connection method, speed figures, ping, packet loss, modem lights and every change already attempted. Screenshots of Windows errors and the provider's status page strengthen the case. This record prevents repeated questions and lets an ISP, NBN technician or computer repairer distinguish symptoms from assumptions.

If the network test is normal but the Windows computer remains slow, switch attention to the PC. Check disk health, memory use, startup programs, network drivers and browser extensions, and back up important files before repairs. Movian Security can assist with malware detection and removal, system cleanup, driver-related problems, data backup and performance tuning when the fault is inside the computer rather than the broadband service.

Work from the simplest layer outward: device settings, home Wi-Fi, Ethernet, modem and NBN equipment, then provider infrastructure. Repeat the speed test after each change because a single measurement cannot reveal intermittent faults. A consistent sequence of evidence produces a faster diagnosis, reduces unnecessary hardware replacement and protects both connection quality and the time spent troubleshooting.