Security practitioners for decades have advised people to limit DNS queries against their DNS servers to only use UDP port 53. The reality is that DNS queries can also use TCP port 53 if UDP port 53 ...

If you are a network engineer or a normal user, you may need to find, open or block a virtual port, such as a TCP or a UDP port for an application. Virtual ports help you manage your network hardware ...

In this tutorial we will discuss the concept of Ports and how they work with IP addresses. If you have not read our article on IP addresses and need a brush up, you can find the article here. If you ...

A number assigned to applications and services in a TCP/IP network, such as voice and video calling, that do not require a 100% reliable delivery of packets. See UDP and TCP/IP port. THIS DEFINITION ...

Two separate applications cannot listen on the same UDP port. You could however write an app to listen on the port, then rebroadcast it to the other ports. Then configure the other applications to ...

PortExpert is a free application that can give very useful information about all TCP, UDP communications connected to the system and is hence useful to identify potential threats. These days we are ...

The two most common transport layer protocols are the transmission control protocol (TCP) and the user datagram protocol (UDP). One of the main differences between the two protocols is reliability.

Two simple filters for wireshark to analyze TCP and UDP traffic Your email has been sent Wireshark is a protocol analyser available for download. This week’s post ...

Have you ever performed surgery on data packets? There are times when that may be the best way to troubleshoot and optimize your network. This edition of the Packet Professor will get you started in ...

New standalone core delivers ultra-high-throughput, low-latency UDP/IP offload for data centers, AI training, media streaming, HPC, and real-time systems. Woodcliff Lake, NJ — March 10, 2026 — CAST, a ...