What does network testing mean? Detailed explanation of the principle and function of network testing

in the digital office and daily entertainment are highly dependent on the network, network cards, high latency, connection interruption and other issues often affect the experience, and network testing is the core means to investigate such problems and ensure network quality. It is not limited to professional operation and maintenance scenarios, ordinary users can also use relevant tools to understand their own network status. This article will dismantle the core content of network testing in an all-round way from basic definitions, technical principles, practical effects to implementation methods, so that readers with different needs can master relevant knowledge.

What is the core definition of network testing?

many people's cognition of network testing stays in measuring network speed, but in fact its scope is much broader, and it is a systematic network state assessment method.

1, the basic connotation of network testing

network testing refers to the process of detecting and evaluating the connectivity, bandwidth, delay, packet loss rate and other indicators of the network through specific tools or technical methods. It can not only target the network status of a single end point, but also cover the overall performance of the entire local area network or wide area network. The core goal is to accurately grasp the actual operation of the network.

2, the applicable scenarios of network testing

the application scenarios of network testing run through the network life cycle, from the acceptance test after the new network is built, to the regular inspection in the daily operation and maintenance, to the problem investigation after the network failure, and even the network stress testing before the large-scale event, are inseparable from the support of network testing. Ordinary users can also judge whether the home network meets the bandwidth standard promised by the operator through network testing.

What are the core technical principles of network testing?

network testing can accurately obtain various indicators, relying on mature technical principles behind the support, there are differences in the testing principles of different indicators.

1, the technical principle of bandwidth testing

bandwidth testing is the most common type of network testing. The principle is to convert the actual upload and download bandwidth by sending a large number of test data packets to the target server to count the amount of data successfully transmitted per unit time. During the test, data packets of different sizes are sent multiple times to avoid the chance of a single test and ensure that the results are closer to the real state.

2, Delay and Packet Loss Testing

delay test mainly relies on the ICMP protocol, by sending test data packets and recording the time difference from sending to receiving the response, the network delay value is obtained; packet loss test is to count the number difference between sending data packets and receiving data packets, and calculate the packet loss rate.

What is the practical role of network testing?

(The value of network testing is not only to find problems, but also to provide data support for network optimization and fault resolution, which is the key to ensuring the reliable operation of the network.)

1, ensure network performance

through regular network testing, operation and maintenance personnel can grasp the changes of Internet bandwidth, latency and other indicators in real time, timely find the problem of performance degradation caused by insufficient bandwidth and equipment aging, and take measures such as expansion and equipment upgrade in advance to ensure that network performance always meets business or use needs.

2 Quickly locate network faults

network testing can accurately locate the point of failure when network connection is interrupted, video card, file transfer failure, etc. For example, through segmented network testing, it can determine whether it is an end point network interface card failure, a router problem or an operator line failure, which greatly shortens the troubleshooting time and reduces the loss caused by network failure.

3, optimize network resource allocation

network test can count the distribution of network traffic in different time periods and different regions, operation and maintenance personnel can adjust the bandwidth allocation strategy according to these data, and more preferential treatment will be given to high-demand areas or time periods to avoid network congestion in some regions and idle resources in others.

What are the common network test implementation methods?

network testing implementation methods are divided into professional operation and maintenance level and ordinary user level according to the different test subjects and needs, each with corresponding tools and processes.

1, professional network testing methods

professional operation and maintenance personnel usually use professional tools such as Wireshark and Iperf for network testing, which can capture and analyze network data packets, provide detailed bandwidth, latency, packet loss rate and other indicators, and can also carry out long-term network traffic monitoring and stress testing.

2, ordinary user level network test method

ordinary users do not need complex tools, through the online network test platform or mobile APP to complete the basic test. For example, open the online speed measurement website, click the test button to quickly obtain upload, download bandwidth and delay data; some routers also have their own network test function, which can directly view the device connection status and network indicators in the local area network.

sum up, network testing is the core evaluation method covering the whole life cycle of the network. From the basic definition to the technical principle, to the actual function and implementation method, each link is closely related. It can not only help professional operation and maintenance personnel to ensure network stability, optimize resource allocation, but also allow ordinary users to understand their own network status. Mastering the relevant knowledge of network testing, whether it is troubleshooting network failures or improving network experience, can provide strong support.