Network Q&A (1)
1.
Answer: It is possible that the customer has modified the task timeout. A short timeout may cause the process to be forcibly interrupted before it ends, so Log cannot be obtained. It is recommended not to modify the timeout period
2.
Answer: WebGL cannot be used under the system account. We enable it by default (to put it simply, it cannot be implemented).
3.
Answer: Focus on the client Redirect Count. In addition, there was a small problem with chrome before that the data in the Extra Wait Time could not be captured (this problem has been fixed, so the task of adding Redirect Count before will now cause the task to time out). In addition, under IE10 and IE11 browsers, if the customer uses localstorage technology, we will not be able to obtain this part of the data.
4.
Answer: If the Error code of Probe is 6XXXXX, then the Error data is not included in Trend Chart. The reason is to prevent the Error Probe data from affecting the average value. For example, the average Total Download Time of ten points is 3 seconds. A Probe error reporting task times out and ends in 120S. If the data at this point is counted in the trend, the average value will be raised to 12S, which is obviously inaccurate.
5.
Answer: It has nothing to do with this mission. This Probe has done streaming tasks in the last hour, then the Download Speed calculated from the last streaming task is the average Download Speed
6.
Answer: The task will be sent to mobile phones that do not support https to do the task, resulting in incomplete data or failure to perform the task.
7.
Answer: Only when the task data returned by the client appears Error when parsing the data, let the client do the task again and send it again.
8.
Answer: In the recent streaming task of this Probe (this is not sure how many times or how long), the proportion of points that did not appear to be rebuffered during the playback process accounted for the total points
9.
Answer: The chrome kernel supports most of the 2.0 protocols. If the website and client use the 2.0 protocol, then there is a feature: the status code of the response header is 200, while the 1.1 version is 200 OK.
10.
Answer: Yes, but you need to enable OPSAPI independently
11.
Answer: Because the real machine only downloads about 200K, it must be different from the MD5 value of all downloads (if the data is different by one byte, the MD5 value will be different)
12.
Answer: Because VLC’s playback mode is playing while downloading. Although there is only one Element resource, VLC actually downloads it part by part. Each download will have a range header in the HTTP header to specify which part of the resource to download. So pay attention to the status code should be 206. Then during the loading process, if a video cannot be connected when downloading, an error will be reported and the connection cannot be established (warning)
13.
Answer: Because in order to control traffic and save costs, we include a range header when sending HTTP request, which means only the first 2K of data of Request. If the customer wants to download more, let him or her configure the HTTP header. However, we must consider the cost issue and the current download data is large, so there will be problems with the data displayed in our reports.
14.
Answer: The mobile phone’s CPU, Network delay, and packet loss will be used to determine whether to issue a task.
15.
Answer: Negative numbers are correct. The captured positive number should be 85dBm. From a code perspective, it means that the captured signal value is invalid, and the indicator of 85 is given by default.