Post Views: 1,615 Most people do not know this, but TCP CUBIC is the dominant congestion control algorithm used in modern TCP/IP networks. It is designed to efficiently utilize high-speed, long-distance links while maintaining fairness across flows with different round-trip times (RTTs). Today, it is the default congestion control algorithm in most Linux systems, and […]
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Post Views: 1,617 I have been teaching Wireshark classes since the early 2000’s, and using it since it was called Ethereal. My usage has primarily focused around troubleshooting network issues that have a packet capture associated with them. My fellow troubleshooters will tell you that this is not always the case. But, if we are
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Post Views: 926 Check out these great references as well: Our custom profiles repository for Wireshark Our Udemy course on Wireshark Our Udemy course on Wireless Packet capture In our previous post I showed you how to use Wireshark’s Ring Buffer feature. I think we can all agree how great that feature is. In this
Combining Wireshark Ring Buffers with Capture Filters for Performance Read More »
Post Views: 2,097 Check out these great references: Our custom profiles repository for Wireshark Our Udemy course on Wireshark Our Udemy course on Wireless Packet capture Wireshark’s Ring Buffer feature is a capture mechanism feature that automatically rotates packet capture files based on size or time limits, overwriting the oldest files when a defined limit
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Post Views: 15,039 At CellStream, we design and deliver technology training programs specifically aligned to the realities of today’s broadband, telecommunications, and IP-based networking environments. Our focus is not generic IT instruction — it is highly curated, operationally relevant education built for service providers, network engineers, broadband technicians, sales teams, leadership, and customer-facing staff. Our
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Post Views: 1,166 This is a great question recently asked by one of our students/clients when we said our usual introductory comments that “No we won’t spam you”, and “No we don’t use the click model on our sites”. Now most of you know, we are a small family business, and have been since day
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Post Views: 1,603 The following is a technical SWOT analysis for Network Engineers, Security Engineers, and Senior Technicians. I apologize for the high number of acronyms used below, but hey, this is networking! In networking, Zero-Trust is not a single product or control. It’s an architecture and operating model where no network location (LAN, WAN,
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Post Views: 1,290 What I have created here is a somewhat technical SWOT Analysis for Network Engineers and Technicians for one of today’s top networking subjects of interest: the high speed needs being delivered by Ethernet technology for AI and for Data Centers. Introduction: Why High-Speed Ethernet Matters in AI Infrastructure High-Speed Ethernet has become
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Post Views: 684 A SWOT analysis is a structured analytical framework used to evaluate a subject from four complementary perspectives: Strengths, Weaknesses, Opportunities, and Threats. We have been providing SWOT analyses for our clients since our inception. You can read more about that service here. For now, however, let’s simplify and explain what a SWOT
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Post Views: 2,453 Check out these additional IPv6 Resources Our IPv6 overview course at Udemy Our IPv6 Custom Profiles for Wireshark Our IPv6 classes at the Online School OK folks, based on some feedback from Reddit, I decided to update this post from 2013. Modern Linux distributions have largely deprecated the legacy net-tools suite (which
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Post Views: 1,493 A broadband technician working with fiber optics must understand both the theory and the hands-on operational realities of fiber networks. The following areas represent the core knowledge required to install, maintain, and troubleshoot fiber effectively in access and distribution networks. 1. Fiber Fundamentals Technicians must understand how fiber carries data as light,
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Post Views: 1,008 Since 2023, we have shared information that helps folks that travel the western US. We learned about this site that has live cameras and warnings of road conditions, travel information, traffic cams, weather warnings, incidents, and much more from a colleague (thank you Doug Galarus!), and have used it on our many
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Post Views: 6,682 Below is a clean, technician-focused list of the Windows PowerShell commands used for Wi-Fi and WLAN troubleshooting, organized by function. This aligns well with broadband-tech workflows, capture analysis, and WLAN Operations fundamentals. You will find a more comprehensive and updated version of this post at our Patreon community. You will find the complete
Windows PowerShell Commands for Wi-Fi and WLANs Read More »
Post Views: 6,942 Here’s a solid toolbox of Windows PowerShell commands used for network troubleshooting, with quick notes on what each one is good for. I’ll try to group them by task so they are a little easier to remember. 1. Basic Connectivity & “Ping-Style” Tests Test-Connection PowerShell’s ping (ICMP echo) equivalent. Test-NetConnection More advanced
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Post Views: 12,601 CellStream, Inc. – Telecom Consulting and Training! 1-Day, Instructor Led, Web Based Delivery or Self Paced, OnlineMinimum: 10 StudentsWeb Based Delivery: Max class size is 30On Site Delivery: Max class size is 20 Click here to go to the Online Class. Course Description: Network Troubleshooting Fundamentals for Technicians is a hands-on technical course
CSI-SP-008 – Network Troubleshooting Fundamentals for Technicians – 1D Read More »
