1T6-540 syllabus - Advanced Troubleshooting with InfiniStream Network Mgmt Updated: 2023

Click on the Start button and search for Command Prompt. Open Command Prompt with elevated privileges by right-clicking on it and selecting the Run as administrator option.

You can open Netstat by typing the following command and pressing ENTER:

netstat

You may not understand what the columns mean if you’re new to networking.

• Proto: The network protocol. It could be either TCP or UDP.
• Local Address: The IP addresses and ports of your computer’s network interfaces for the given connections.
• Foreign Address: The IP addresses and port names of the remote devices.
• State: Indicates the state of the connection. For example, find out active and closed connections.

The netstat command shows you your active connections and their details. However, you’d notice that the foreign address column prints the IP address and port names.

To show the connections’ port numbers instead of the port names next to the IP addresses, use the following command:

netstat -n

Further, the system can disconnect or connect to networks, and the network details can change at intervals. Hence, we can use the following command to refresh the netstat network details at intervals using this command:

netstat -n 5

To stop the refreshing, press the CTRL + C key combination.

NOTE: The 5 in the command above refreshes the command every 5 seconds. If you wish to increase or shorten the interval, you can modify this value.

2] Use netstat parameters to filter connection information

The netstat command is a powerful command that can show you every detail about your device’s connections. Explore the most commonly used netstat parameters to find specific network details.

• Display active and inactive connections

Show the networks that are active or inactive.

netstat -a

• Display applications information

List all applications that are associated with the connections.

netstat -b

• View network adapter stats

Show statistics on incoming and outgoing network packets.

netstat -e

• Display foreign addresses’ fully qualified domain name (FQDNS)

If you don’t want to see the port numbers or names, the following netstat parameter will show your foreign addresses’ fully qualified domain names.

netstat -f

• Show port numbers instead of names

Change the foreign address port names to port numbers.

netstat -n

Similar to netstat, and it has an extra column for every connection’s Process ID (PID).

netstat -o

• Filter connections by protocol

Display the connections for the protocol you specify – UDP, TCP, tcpv6, or udpv6.

netstat -p udp

NOTE: You should change the udp part to the protocol whose connections you want to view.

• View non-listening and listing port

Show connections and their listening and bound non-listening ports.

netstat -q

Categorize networks by available protocols – UDP, TCP, ICMP, IPv4, and IPv6.

netstat -s

Show the routing table of your current network. It lists every route to the destination and matrix available on your system. Similar to the route print command.

netstat -r

• Display offload state connections

Show a list of connection offload states of your current connection.

netstat -t

• See NetworkDirect connections

Shows all NetworkDirect connections.

netstat -x

• Display connection Templates

Show your networks’ TCP connection templates.

netstat -y

3] Combining Netstat parameters

You can further filter the Netstat parameters to show you information about your connections any way you want. From the above commands, you only have to add a second parameter to show a combined view.

For instance, you can combine the -s and -e parameters to view the statistics for every protocol. This way, you can combine other parameters to get the desired results.

When mixing multiple Netstat parameters, you don’t need to include two dashes (-). You can use one dash (-) and append the parameter letters without a second one.

For example, instead of typing the following command:

netstat -s -e

You can write it as:

netstat - se

If you forget the parameters, a quick way to remember them is by asking netstat to help. Simply run the following command:

netstat /?

To stop the netstat query process, press the CTRL + C key combination.

Can we check network connectivity using netstat?

We can check network connectivity using the netstat or network statistics command. This allows us to see active network connections and their status. The tool can view incoming and outgoing network connections, routing tables, port listening, and usage statistics. This command can be handy for network administrators when troubleshooting network issues. By understanding how to use this command, you can quickly and efficiently diagnose problems with your network.

How do I see network issues in Windows?

You can check your network connection status in Windows quickly and easily. Select the Start button to do so and type “settings” into the search bar. Once you’re in the Settings menu, select “Network & internet.” The status of your network connection will be displayed at the top of the page. If you’re having trouble connecting to the internet, this is a helpful first step in troubleshooting the issue. You also check quickly, and if you see the wifi icon missing, you have a network issue.

The problem might be related to your router. So, the first thing you should do to fix the error is to reset your router. In case the issue is caused because of a temporary glitch with your router, this should fix the problem.

You should try power cycling your router. For that, unplug your router and then wait for about a minute to let it shut down completely. After that, plug it back and restart the router. This will clear the router cache and reset the networking device.

See if the connection error notification still pops up when you click on the WiFi icon. If it does, you should try some other method to fix the problem.

Read: WiFi is turned off and won’t turn on in Windows 11/10.

2] Run Network Troubleshooter

Windows 11/10 has automated troubleshooting tools, known as troubleshooters. You can run a dedicated troubleshooter on your system depending on the problem you are experiencing on your Windows device. Network Troubleshooter is one such troubleshooter that helps you resolve network problems (if possible). The steps to run Network Troubleshooter are provided below:

1. Open Windows 11/10 Settings.
2. Go to “System > Troubleshoot.”
3. Click Other troubleshooters. In Windows 10, you will find Additional troubleshooters in place of Other troubleshooters.
4. Select Network Adapter and click Run.

3] Change power management settings

This error can be a result of your power management settings. If the power mode for your wireless adapter is not set to maximum performance, it might cause this problem. So, try changing your power management settings if the scenario applies. Here are the steps to do that:

1. Firstly, click on the taskbar search button and then enter Change plan settings in the search box.
2. From the appeared results, click on the Edit power plan option.
3. Now, tap on the Change advanced power settings option to open up the Power Options window.
4. In the Power Options window, locate the Wireless Adapter Settings drop-down and expand it.
5. Next, expand the Power Saving Mode option and then set the On Battery and Plugged in options to Maximum Performance.
6. Finally, click on the Apply > OK button to apply changes.

See if this method fixes the problem for you.

4] Update network adapter drivers

This problem is most likely to be associated with your network adapter drivers. As we know, faulty and out-of-date drivers are known to cause various errors and issues on the system. If the scenario applies to you, you should try updating your network adapter drivers and see if the problem is fixed.

You can manually update drivers in Windows 11/10 or use a free third-party driver updater to update drivers automatically. Besides that, you can also visit the official website of the manufacturer and download the latest version of your drivers from there. I would recommend you to opt for the latter method.

After updating your network adapter drivers, reboot your PC and then check if the issue is fixed or not. If not, move on to the next potential fix to resolve the error.

See: WiFi Adapter not working on Windows 11/10 computer.

5] Reinstall your network drivers

If you are unable to fix the problem by updating your wireless card driver, the problem might be caused due to corrupted or faulty driver installation. In that case, you should be able to fix the error by reinstalling your network drivers. So, first, uninstall the driver and then reboot your PC. The new driver should be automatically installed on the next startup. If not, you can get the latest drivers from the official website of the device manufacturer and then install the driver. Hopefully, this will fix the issue for you.

6] Roll back to the older diver

In some cases, the error might be triggered due to a latest driver update. As reported by some affected users, they were able to fix the error by rolling back to the older version of your driver. In case you are dealing with the same problem, this solution might work for you as well, so try doing that. You can roll back your driver using this guide.

Read: How to fix Unidentified Network in Windows 11/10.

7] Disable your firewall

Some users have suggested that the problem is caused due to their firewall. It might be interfering with your system and leading to the “Not connected, No connections are available” error notification. If that is the case, you can try disabling your firewall temporarily to fix the problem.

To disable your firewall, simply open the Windows Defender Firewall and then select the Turn Windows Defender Firewall on or off option from the left panel. Now, choose the Turn off Windows Defender Firewall (not recommended) option for both Private and Public networks. If the problem is resolved after doing so, your firewall was the main culprit. To fix the issue, you will have to change some settings in your firewall. If that doesn’t help, maybe it’s time to consider some other firewall software for your system.

See: Internet or WiFi gets disconnected after Sleep in Windows 11/10.

8] Flush your DNS cache

Flushing the DNS cache clears IP addresses and other DNS records from your system. This action is helpful in many cases, like when you are experiencing network issues. If the problem still persists, we suggest you flush your DNS cache and see if it helps.

9] Remove the problematic application

There might be some problematic application on your PC that is interfering with your network connections. It could be your third-party antivirus, firewall, or some other third-party suite. Some users have reportedly faced this problem with Zone Alarm Firewall and they were able to fix the issue by uninstalling it.

You can try troubleshooting the problem in a clean boot state. Perform a clean boot and then check whether the problem is resolved. If yes, the problem is most likely caused by software conflicts. You will have to remove the software causing the conflicts to resolve the problem. You can manually uninstall the programs via the Settings app, or use a free software uninstaller to completely remove the program.

To start your system in a Clean Boot state, you have to disable all the third-party apps and services via MSConfig. After starting your system in the Clean Boot state, check if you can access the internet or get the same error. If the error does not occur in the Clean Boot state, any third-party software or service is the culprit. Now, enable some of the startup apps and services, and start your system in a normal state. See if the problem persists. If yes, one of the startup apps and services that you have just enabled is the culprit. In this way, you can identify the problematic third-party app and service.

Why can’t connect to this network Windows 11?

If your Windows 11 PC is unable to connect to a network, make sure the problem is system-related, not network-related. Try connecting to the same network on a different device like your mobile and see if you are able to connect to the network. If you are able to connect to the network on other devices, the problem is with your system. You can try rebooting your computer, adding the network again, disabling the firewall, updating your Windows, rolling back your driver, or running the Network troubleshooter.

Check out this guide to fix the error.

Read: Fix No internet, Secured WiFi error on Windows 11/10.

That’s it!

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