Network Q&A (2)
1.
Answer: Keep it for up to seven days
2.
Answer: Pay attention to the validity period of the task. The validity period must be longer than Stress testing time. For example, if Stress testing is at 12 noon on January 1, then the task validity period must be after 12 o'clock. Otherwise, operation and maintenance will be able to execute Stress testing normally, but the scheduler will not issue this task.
3.
Answer: The browser also needs some time when initializing the page and other actions. This part of the time has nothing to do with the customer's various indicators. This may have something to do with the performance of Probe (the answer is more or less this time, absolutely). If the customer is very concerned, just ignore Client Time. Total Download Time will become smaller, but First Contentful Paint (FCP) will not change at this time.
4.
Answer: Available on XP and WIN7 or above (WIN7 cannot)
5.
Answer: Yes, the default is 500 times per day
6.
Answer: It is possible that the system time of Probe is inaccurate, causing the problem. Instant Testing open debug
7.
Answer: The reason is that our server will not modify the database in real time. I will accumulate these to a certain extent and modify them together later. As for how long it will take, we are not sure. If you want to use it immediately, you can only find the backend and change the account name that previously existed in the database to any character, so that there will be no conflict. You can recreate it immediately.
8.
Answer: This type of Error is generally an HTTP status code run out by the server that does not exist in our Error code base. The code of page Error404 is 600404 and we definitely don’t know if it is customized by the customer. So directly display 600XXX, you can turn on the report capture and look at the response status code of Request from the packet capture.
9.
Answer: First close the client, then open the Synthetic Tasks server, kill all IE processes, and then restart the client.
10.
Answer: You can avoid IPv4 Probe from accessing IPv6 Host by selecting "Only use IPv4 Probe" in the task. The default is to select "IPv4/IPv6 mixed mode"
11.
Answer: It is recommended to try chrome. Older versions of XP systems do not support HTTPS very well, and you may get this Error error when using IE.
12.
Answer: About 2000 bytes, estimated to be about 600 IPs (if you have to write this or that many, you can calculate the exact value yourself)
13.
Answer: Not necessarily. But this is meaningless. IDC may ban ping. LM's IP is dynamic. If it is a customer inquiry, just reply directly: We do not provide this service, and it is normal for the ping to fail.
14.
Answer: Unfortunately, you can't see all the tasks assigned to the package. If you want to ensure that each sub-account can only see and manage its own tasks, it would be very troublesome to open an independent package for each sub-account so that they do not interfere with each other.
15.
Answer: Customer Host only recorded a few visits, but our report may encounter many situations before the data is stored in the database, such as trace volume, noise, and resending. Therefore, our report also has an indicator called the storage rate. For example, 90 of 100 should be sent to the database, which means 90% is stored in the database. However, the customer may have 100 records or even 101 records (we will reissue a visit in one case)
16.
Answer: We bought a third-party service to help parse the streaming media page. The response is HTTP, so there will be no handshake time.
17.
Answer: From some packet captures, we found that if the customer has requirements for the SSL version during the SSL Handshake Time, such as TLSV1.0 and above, then the Request sent by Probe that only supports SSL2.0 or SSL3.0 will be RST dropped by the server. Of course this is only one possibility
18.
Answer: Which Host to connect to is determined by the browser itself, because we control what kind of DNS (A or AAAA) Request is sent by Probe, but we do not control who Probe establishes a connection with.
19.
Answer: If we do not specify Probe mode (mixed mode):
20.
21.
If you specify IPv6 Probes:
22.
23.
Answer: Under the IE kernel, a system function will be called before each Request access to directly clear the computer's own cache. However, due to different policies, Chrome must initiate DNSRequest every time it is accessed instead of going through the cache.