有时，我们用来连接互联网^(Internet)的无线路由器和加密狗的功能就像一堆无用的塑料。无论您多么努力地尝试连接，设备都不会响应您的请求。在这种情况下，如果您手头没有好的诊断工具，就很难识别、隔离和纠正问题。

幸运的是，如果您是Google Chrome用户，那么有一个简单的方法！Chrome 连接诊断程序^{(Chrome Connectivity Diagnostics)}可能正是您要寻找的应用程序。来自Google的Chrome 扩展程序是一种用于^{(Chrome extension)}Chrome和ChromeOS的快速简单的网络测试和故障排除工具。当互联网的全部力量自由流动时，人们发现安装它几乎没有用。但是，当您遇到连接问题时，您可以释放其真正的潜力。

^{(Chrome Connectivity)} 来自Google的^(Google)Chrome 连接诊断^{(Diagnostics)}

该工具通过UDP^(UDP)、TCP、HTTP和HTTPS建立与网络和^(HTTPS)Internet服务的连接，测试计算机的网络连接是否存在常见问题、端口阻塞和网络延迟。

访问Chrome 应用^{(Chrome App)}商店并下载扩展程序。启动应用程序，测试将自动开始运行，并显示如下所示的进度条。

测试完成后，您会看到问题。

就我而言，有两个问题，

1. DNS 解析耗时过长
2. ^{(Web Request)}向Google发出 Web 请求的时间过长

有关更多详细信息，您可以选择右上角的齿轮图标，然后单击“显示通过测试”。^(Gear)

这将向您显示不同的测试结果。单击各个测试将提供测试的简要说明和日志链接。

Chrome 连接诊断功能：^{(Chrome Connectivity Diagnostics Features:)}

• 本地网络连接可用性
• DNS 服务器可用性和延迟
• DNS cache poisoning/spoofing
• ^(Internet)HTTP强制门户或防火墙阻止Internet流量
• ^(Network)Google网站的网络性能和延迟
• Google Hangouts服务可用性

如果您碰巧使用的是Chrome OS设备，您还会注意到两个额外的测试：

1. Wi-Fi 信号强度
2. 默认网关是可达的。

您可以在此处^{(here)(here.)}获取Chrome 连接诊断^{(Chrome Connectivity Diagnostics)}扩展程序。

Chrome Connectivity Diagnostics Plugin tests your Network Connection

Sometimes the wireless router and dongle that we use tо сonnect to the Internet, functions like a useless heap of plastic. Nо matter how hard yoυ try to connect, the dеvice just doeѕn’t respond to your request. Under such circumstаnсes, if уоu do not have a good diagnostic tool at hand it becomes difficult tо identify, isolate and reсtify the problem.

Luckily, if you’re a Google Chrome user, there’s an easy way out! Chrome Connectivity Diagnostics might just be the app you would be looking for. The Chrome extension from Google is a fast and simple network testing and troubleshooting tool for Chrome and ChromeOS. People find it of little use to install when the full force of the internet is flowing freely. However, you can unleash its true potential when you experience connectivity issues.

Chrome Connectivity Diagnostics from Google

The tool tests a computer’s network connection for common issues, port blocking, and network latency by establishing connections to network and Internet services via UDP, TCP, HTTP and HTTPS.

Visit the Chrome App store and download the extension. Launch the app, the tests will automatically start running with a progress bar like the one appearing below.

When the test is complete, you are presented with the problem/s.

In my case, there were 2 issues noted,

1. DNS Resolution taking too long
2. Web Request to Google taking too long

For more detailed information, you can select the Gear icon in the upper-right corner, and click on “Show Passing Tests.”

This will show you different test results. Clicking on the individual tests will provide a brief description of the test and a link to the logs.

Chrome Connectivity Diagnostics Features:

• Local network connection availability
• DNS server availability and latency
• DNS cache poisoning/spoofing
• Internet traffic blocks by an HTTP captive portal or firewalls
• Network performance and latency to Google websites
• Google Hangouts service availability

If you happen to be on a Chrome OS device, you’ll also notice two additional tests:

1. Wi-Fi signal strength
2. The default gateway is reachable.

You can get the Chrome Connectivity Diagnostics extension here.

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