What Is a Network Delay?

Network delay refers to the transmission of all kinds of data through network protocols (such as TCP / IP) in the network medium. If the amount of information is too large and not restricted, excess network traffic will cause the device to respond slowly and cause network delay.

Network latency

Network latency is when all kinds of data

Definition: in

Test it with the Ping command as follows:

1.Ping the local IP

For example, the local IP address is 172.168.200.2. Then execute the command Ping 172.168.200.2. If there is no problem with the network card installation and configuration, it should have a display similar to the following:

Replay from 172.168.200.2 bytes = 32 time <10ms

Test network speed

The first step, the WIN desktop-start-run

The second step, enter: CMD Enter-Enter

Improve WAN performance

Enterprises can fine-tune the performance of applications within the LAN, but this control cannot be extended to the WAN. WANs usually have multiple optional service providers who operate carrier-grade top-level backbone infrastructure. WAN operators can also contribute to reducing latency by choosing shorter and more efficient routing paths, deploying low-latency switches and routing equipment, and proactively avoiding network equipment downtime.

Increasing WAN bandwidth can improve application performance, but bandwidth isn't cheap and it usually doesn't have to be that way.

In practice, the use of various technologies that can more effectively utilize existing WAN bandwidth can also improve the performance of WAN applications. These technologies are collectively referred to as WAN accelerators. Accelerator capabilities are achieved by reducing data payloads and making more efficient use of existing WAN bandwidth.

WAN acceleration products are usually physical devices. These specialized devices need to be deployed on both sides of the WAN link. For virtualized server environments, software versions of these tools are also available, which can perform many functions equivalent to dedicated hardware.

Some compression algorithms are specific to specific data types and can significantly improve application performance without increasing bandwidth requirements. The reason is simple. Data compression can increase storage capacity without additional disks. Similarly, compressed data can take up less bandwidth than uncompressed data during transmission.

If your business relies heavily on WAN links, consider creating a local cache for frequently used data. The Microsoft Windows server operating system can provide Branch Cache, and there are many third-party tools that can create caches for remote resources. Cache common data on each end can reduce the large bandwidth consumption caused by data retransmission. Before transmitting a file, the sender will retrieve the cache of the receiver: if the file is already cached, the receiver simply extracts data from the existing cache; if the file is not in the cache, the file is allowed to be sent. Advanced cache options can selectively protect critical files, prevent important cached data from being overwritten by subsequent files, and ensure that the most important data is continuously cached.

Frequent packet loss and retransmissions can sometimes severely degrade performance. Active error correction allows the target network to repair packet errors without retransmitting them. There are other ways to reduce the amount of data: remove excess content from Java script or style sheet code, or lossless compression of lossless image data to reduce file size significantly. ^[1]

Fix application performance on LAN

If an application that has just been installed or modified has local network performance issues, try checking the application's settings, system compatibility, and software status; you should also review the installation and setup documentation. For example, if your application supports bandwidth throttling, check if the bandwidth is accidentally over-restricted for normal communication.

Hardware compatibility also affects LAN efficiency. For example, if your application is experiencing high latency when using jumbo frames, check that the network interface card (NIC) adapter and driver are installed correctly. In some cases, updates or patches may reverse originally poor performance.

After you have installed the application on a hardware that does not have compatibility issues, installed the patch, and set it up correctly, if the performance is still not satisfactory, you should try other options. The problem is often that the server load is too concentrated and there are not enough network card ports and too many applications are competing for the network. Try increasing the number of NIC ports to provide the server with additional links to share workloads. NIC port bundling provides bandwidth overlay aggregation for critical applications. Balancing workloads and moving busy applications to more idle servers can also reduce bandwidth contention and improve performance.

With NIC bundling, a single application can utilize the sum of the bandwidth of these ports for data transmission across multiple NIC ports. For example, if you bundle 2 Gigabit Ethernet ports, the application will get a total bandwidth of 2Gbps.

Another measure is workload balancing, moving virtual machines between servers, and optimizing application workloads and bandwidth requirements for each physical host.

Data centers can also consider replacing the server's network card with a 10 Gigabit or faster model or installing a dedicated network adapter separately for troubled high-bandwidth applications. Of course, faster NICs can be very expensive, the process of installing physical components requires the server to be taken offline, and often adds to the cost of supporting the LAN switching infrastructure. For example, if a 10 Gigabit Ethernet adapter is installed on the server, a switch with a 10 Gigabit Ethernet port is required to match it.

To diagnose LAN connectivity issues, you can compare the current application's performance level with the baseline performance of the same application under normal operating conditions. If application performance is not significantly degraded, the problem may be elsewhere outside the server, such as a network switch problem. ^[2]