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.

Artificial Intelligence Tools that you May Find Useful

The CellStream Blog / By

Post Views: 4,632 The following are some AI tools that you may find very useful in your life and even small business.  For example, Microsoft is in the process of launching a Microsoft 365 AI based assistant called Copilot for the office suite of programs (you can read more about this here:  https://www.microsoft.com/en-us/microsoft-365/blog/2023/03/16/introducing-microsoft-365-copilot-a-whole-new-way-to-work/) There are a

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Zero-to-Hero – Wireshark TCP Conversation Completeness

Networking and Computing Tips and Tricks / By

Post Views: 80,960 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 Introduced in version 3.6 and later is a new Wireshark expert analysis process called TCP Completeness. At first this was quite confusing, but once you get to

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CSI-HO-039 – Hands On Advanced Ethernet and TCP/IPv4

L2 Ethernet Courses / By

Post Views: 13,124 2-Day Instructor-Led Hands-On Lab ClassAvailable in either Web-Based Delivery or On-Site DeliveryMinimum 10 Students – Maximum 16 Students Course Description Modern Ethernet networks depend on much more than basic switching. Network technicians and engineers increasingly need to understand Ethernet behavior, TCP performance, IPv4 addressing, routing, and packet-level troubleshooting as an integrated set

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CSI-HO-038 – Hands On Advanced Ethernet and Netmask

L2 Ethernet Courses / By

Post Views: 14,175 4-Day Instructor-Led Hands-On Lab ClassAvailable in either Web-Based Delivery or On-Site DeliveryMinimum 10 Students – Maximum 16 Students Course Description Modern Ethernet networks extend far beyond basic switching and VLAN operation. High-performance applications, storage systems, data centers, and converged networks depend on Ethernet, TCP/IP, addressing, routing, and specialized storage protocols working together

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CSI-HO-037 – Hands-On L2 Ethernet Fundamentals

L2 Ethernet Courses / By

Post Views: 13,690 2-Day Instructor-Led Hands-On Lab ClassAvailable in either Web-Based Delivery or On-Site DeliveryMinimum 10 Students – Maximum 16 Students Course Description Ethernet is the foundation of modern local area networking and remains one of the most important technologies for technicians, engineers, network administrators, and support personnel to understand. While Ethernet may appear simple

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How To Discover What is on your LAN/WLAN – Option 1

Networking and Computing Tips and Tricks / By

Post Views: 5,480 Who is on my network?  Great question.  Better yet: Who is on my customer’s network?  That would be looking at the issue from a service provider’s perspective. This article attempts to answer that question with tips and tricks and tools that will help you, whether you are the owner of a network or

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Zero-to-Hero on Wireshark Columns

Networking and Computing Tips and Tricks / By

Post Views: 62,156 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 When you first start using Wireshark you will find that the great folks at Wireshark provide us with a “Default” profile.  This is where we all started. 

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CSI-HO-036 – L1, L2, and L3 Networking Protocols – 3 Day Hands On Lab Course

L2 Ethernet Courses / By

Post Views: 13,159 3-Day Instructor-Led Hands-On Lab ClassAvailable in either Web-Based Delivery or On-Site DeliveryMinimum 10 Students – Maximum 16 Students What Students are Saying About this Class: Course Description Modern networks depend on technologies operating together across multiple layers. A technician or engineer who understands only Ethernet switching or only IP routing sees just

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Find and Display All Your Wi-Fi Passwords in Windows

Networking and Computing Tips and Tricks / By

Post Views: 3,474 If you have been to one of my Wireshark or Wi-Fi classes then you know I often criticize Microsoft Windows for some of its – well – inexplicable approaches to usage and security.  Here is yet another example. Windows stores several important pieces of information in Wi-Fi profiles to facilitate automatic connections

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Troubleshooting Your Network Using Port Mirroring and Packet Capture

Networking and Computing Tips and Tricks / By

Post Views: 5,742 Scenario Let’s say you have a DHCP server running on a Cisco Switch that is behaving strangely and you want to examine the traffic over a couple of hours while not creating a gigantic unmanageable capture file. A note here: I am doing this on a Cisco switch, but most all vendor

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Troubleshooting The Internet Using Ping (a.k.a. ICMP)

Networking and Computing Tips and Tricks / By

Post Views: 3,588 In this article, I wanted to provide a guide to using ping – ICMP Echo – to troubleshoot your network.  Most people use ping on their platform to test if they can reach a given destination.  Just open up a terminal (Linux or MAC OSx) or command line (Windows: Start> Run> cmd)

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