Welcome to CellStream’s Networking and Computing Tips resource center, where technology professionals, students, and enthusiasts can find practical guidance, troubleshooting techniques, and real-world solutions for today’s networking and computing challenges. Our goal is to help you work smarter, solve problems faster, and build a stronger foundation of technical knowledge.
Whether you’re configuring a network, optimizing system performance, learning a new technology, or troubleshooting a difficult issue, you’ll find valuable insights drawn from decades of industry experience. From Wireshark packet analysis and broadband technologies to Windows, Linux, cybersecurity, Wi-Fi, and Internet protocols, our tips are designed to be practical, actionable, and immediately useful.
• Step-by-step technical guides and how-to articles
• Networking troubleshooting techniques and best practices
• Wireshark tips, packet analysis workflows, and protocol insights
• Windows, Linux, and computing optimization recommendations
• Cybersecurity awareness and protection strategies
• Broadband, Wi-Fi, Ethernet, TCP/IP, and Internet technology guidance
• Productivity tips and tools for network engineers and IT professionals
• Improving network troubleshooting efficiency
• Optimizing computer and operating system performance
• Securing devices, accounts, and data
• Capturing and analyzing packets with Wireshark
• Understanding TCP/IP, DNS, DHCP, Ethernet, and Wi-Fi technologies
• Using industry tools more effectively
We’re always looking for new ideas, questions, and topics to explore. If there’s a networking or computing subject you’d like us to cover, or if you need help solving a technical challenge, connect with us through our Discord community or contact us directly.
Please note that not all tips, procedures, and configuration examples apply to every operating system, network device, software version, or vendor platform. Always verify compatibility and test changes in a controlled environment before implementing them in production networks.
Post Views: 3,707 RFMON stands for Radio Frequency MONitor mode. It is a special mode for wireless network interfaces that allows a device to capture all radio traffic it can receive on a wireless channel, regardless of the intended recipient. All Wi-Fi radios can go into different modes, but that does not mean you can
Post Views: 6,379 WlanHelper.exe is a command-line tool from the Windows Driver Kit (WDK) and the folks at nmap/npcap that is used to manipulate advanced Wi-Fi driver settings, especially for testing and development. It allows you to control wireless network adapter settings such as: Do You Already Have WlanHelper? It’s possible if you have installed
WlanHelper: How to Use It in Windows Read More »
Post Views: 3,092 Here are several VoIP troubleshooting checklists and tools, organized by focus area to help quickly identify and resolve common issues. These checklists are especially useful for IT admins, NOC teams, and VoIP engineers. Are they “the bees knees” of troubleshooting VoIP? No. In fact, if you have feedback or comments on improving
Some VoIP Troubleshooting Checklists and Tools Read More »
Post Views: 3,578 As a frequent reader here will know, my Wi-Fi Analyzer of choice is called WinFi. It has been around many years as is fabulous. In version 2, and the new version 3, you can capture Wi-Fi Beacon Frames and examine them. This post will explain what you can capture and how this
Capturing Wi-Fi Beacon Frames with WinFi Read More »
Post Views: 2,762 PJSIP is a free, open-source multimedia communication library written in C that is used for troubleshooting VoIP. PJSIP implements standard-based protocols such as SIP, SDP, RTP, STUN, TURN, and ICE, targeting VoIP (Voice over IP) applications, including SIP signaling and media handling. You will find the project at github here. What Is
VoIP Troubleshooting with PJSIP Read More »
Post Views: 3,435 This article discusses what SIP pings are, and how to use them in troubleshooting VoIP (Voice over IP) networking. A SIP ping in VoIP is a diagnostic method used to check the availability and responsiveness of a SIP (Session Initiation Protocol) server or endpoint. It’s similar in concept to an ICMP ping,
What are and how to use SIP Pings in VoIP Read More »
Post Views: 7,815 When testing the Internet, there are several key tools we use in troubleshooting: one of them is ping. To verify a particular IP address is operational we “ping 192.168.0.1” from the command line to see if we get an answer back, letting us know that the system we are pinging and the
SIP Testing and Troubleshooting with sipsak Read More »
Post Views: 1,599 At our Online School of Network Science, we have created a Network Scientist Tool Belt. This completely free resource is available for you to access, learn and add software and hardware tools to troubleshoot todays networks. You will just need to set up a free account, and the link will get you
The Network Scientists Tool Belt Read More »
Post Views: 2,951 If you are new to Ansible, I suggest you read our article that defines Ansible, and shows you how to set up an Ansible lab environment to test and learn in. You can also read my article on real world use cases for Ansible right here. One of those use cases is
Two Ansible Network Compliance Examples Read More »
Post Views: 2,512 Load balancing in data networking is the process of distributing network traffic or workloads across multiple resources—such as servers, links, or devices—to: It’s commonly used in: Here is a structured list of the load balancing algorithms used in data networking, across Layer 4, Layer 7, and routing scenarios: 1. Round Robin 2.
Load Balancing in Data Networks Read More »
Post Views: 2,954 Ansible is widely used in data networking for automating configuration, management, and compliance across diverse network devices. We published an article on what this tool is, and how you can set up a lab environment for learning this tool that you can read here. Here are real-world examples of Ansible use cases
Real World Use Cases for Ansible in Networking Read More »
Post Views: 48,248 In this tutorial I am going to make you a pro at using and leveraging the Wireshark TCP Graphing tools. As many of you who have taken my Wireshark Courses know, I am a big fan of visualizing what is going on in a given packet capture or conversation. My #2 troubleshooting
Zero to Hero with Wireshark TCP Graphs: A Tutorial Read More »
Post Views: 14,011 A Wireshark TCP Analysis Flags cheat sheet is essential because TCP is the foundation of most modern network communications, and Wireshark’s built-in TCP Analysis engine automatically identifies performance problems, retransmissions, latency conditions, packet loss, flow-control issues, and connection anomalies that would otherwise require deep manual packet inspection. For many users, the TCP
Wireshark TCP Analysis Flags Cheat Sheet Read More »
Post Views: 4,459 The following commands are like a cheat sheet of essential Windows repair commands. DO NOT USE THESE UNLESS YOU KNOW WHAT YOU ARE DOING. RESEARCH EVERY ONE OF THESE COMMANDS BEFORE EXECUTING. BACK UP YOUR SYSTEM PROPERLY. Command Purpose sfc /scannow Scans and Repairs corrupted or missing system files with the System
Windows Essential Repair Commands Read More »
Post Views: 7,068 As QUIC has emerged to begin its takeover of the Transport Layer (OK – we will never see TCP totally disappear), I have written multiple articles on QUIC. You can look them over here. In the early days Google made this really easy right within the Chrome web browser. As time has
Troubleshooting QUIC Traffic – Not Easy Read More »
