Notes: Port numbers in computer networking represent communication endpoints. Ports are unsigned 16-bit integers (0-65535) that identify a specific process, or network service. IANA is responsible for internet protocol resources, including the registration of commonly used port numbers for well-known internet services. Well Known Ports: 0 through 1023. Registered Ports: 1024 through 49151. Dynamic/Private : 49152 through 65535. TCP ports use the Transmission Control Protocol, the most commonly used protocol on the Internet and any TCP/IP network. TCP enables two hosts to establish a connection and exchange streams of data. TCP guarantees delivery of data and that packets will be delivered in the same order in which they were sent. Guaranteed communication/delivery is the key difference between TCP and UDP. UDP ports use the Datagram Protocol. Like TCP, UDP is used in combination with IP (the Internet Protocol) and facilitates the transmission of datagrams from one computer to applications on another computer, but unlike TCP, UDP is connectionless and does not guarantee reliable communication; it's up to the application that received the message to process any errors and verify correct delivery. UDP is often used with time-sensitive applications, such as audio/video streaming and realtime gaming, where dropping some packets is preferable to waiting for delayed data. When troubleshooting unknown open ports, it is useful to find exactly what services/processes are listening to them. This can be accomplished in both Windows command prompt and Linux variants using the "netstat -aon" command. We also recommend runnig multiple anti-virus/anti-malware scans to rule out the possibility of active malicious software. For more detailed and personalized help please use our forums.

Diesel engines require proper compression to deliver high performance. Using superior products like Cenex premium diesel fuel and high-quality lubricants will help protect engines and ensure healthy compression levels. To learn more, contact a Cenex location near you.

Compression in a diesel engine is essential for effective and efficient performance. And when compression is lacking, damage can result. That is why it’s imperative to know whether your engine’s compression is correct.

With a simple diesel engine compression test, it is possible to spot compression problems before they get worse. Here’s information on these tests and how to decide if it is time to perform one.

Diesel engine compression tests aren’t a preventive measure but are performed if you’re having issues with your machine. If your vehicle is underperforming or experiencing a combination of the issues below, consider a diesel engine compression test.

When you bring your vehicle in for a compression test, a mechanic places a gauge into each of the cylinders to read how much pressure the engine is producing when the engine turns over.

Chad Christiansen has a decade of experience in the cooperative energy business with a background in agriculture and natural resource management. He started his career in sales with CHS and has experience in the cooperative system. Chad is technical expert and product specialist for Cenex Premium Diesel, TOP TIER gasoline and E15 fuels. He holds a Bachelor of Science degree from Kansas State University and has worked with CHS since 2009.

Within a diesel engine, pistons move in a vertical motion, sucking in air as they go. This movement creates the heat needed to ignite fuel, ultimately powering the engine.

Generally, each cylinder should have 300 to 500 PSI, and all cylinders in a single engine should measure within 10 percent of each other. If the compression in the engine is too low, too high or deviates too drastically from one cylinder to the next, you likely have internal damage to your engine.