Author name: Andrew Walding

Andrew Walding is the founder and president of CellStream, Inc., bringing more than 30 years of experience in telecommunications, broadband networking, Internet technologies, and technical education. His expertise spans network engineering, wireless and wireline communications, packet analysis, network operations, emerging technologies, and the design and delivery of advanced technical training programs. A Cisco-certified professional, IPv6-certified specialist, and CBRS Certified Professional Installer (CPI), he helps organizations and technology professionals understand, deploy, troubleshoot, and optimize modern communications networks.

Wireshark TCP Analysis Flags Cheat Sheet

Post Views: 14,041 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

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Where can I get a degree in Network Engineering?

Post Views: 2,048 It’s graduation time. Congrats to all of you graduating!!! It seems that every year around this time someone will ask this great question. In my day, the answer was simple: none! Not anymore. If you’re interested in pursuing a degree in Network Engineering (what I call Network Science) and related technologies, several

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Windows Essential Repair Commands

Post Views: 4,490 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

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What it Takes to Network ShowNet

Post Views: 1,226 Ever wonder what it takes to network an industry showcase like ShowNet? ShowNet is a large-scale demonstration network built annually since 1994. It showcases cutting-edge networking technologies and provides stable internet connectivity throughout the exhibition floor. Over 400 engineers from academia and industry collaborate to design, deploy, and operate this network, utilizing

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Troubleshooting C15 and MGCP Protocols for VoIP

Post Views: 3,024 Let’s start with some simple definitions of these protocols and how they work together. In Voice over IP (VoIP) to PSTN (telephone) network integration, MGCP and C15 can work together as part of a layered signaling architecture that bridges IP-based call control with traditional PSTN switching systems. Here’s how they fit and

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Do VPN applications really protect your traffic, and if so, what exactly are they doing to my packets?

Post Views: 3,001 Yes, VPN applications do protect your traffic. A VPN is like wearing a costume or a mask because it masks your real identity and location (for the most part anyway), just like a costume or mask hides who you are in real life. That said, someone sold you the mask, so they

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Teaching Kids Hexadecimal and Binary

Post Views: 2,649 Teaching hexadecimal and binary, especially around bits, nibbles, and bytes, is an awesome way to introduce kids to how computers “think.” Let’s face it their world is fully computerized and networked. All communications is done in binary, bits, nibbles, and bytes. Heck, its the way computers think. Here is a deeper dive

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