Frequently Asked Questions

Have a question about networking, telecommunications, broadband, Wireshark, or technology in general? You’ve come to the right place. Our Frequently Asked Questions section provides answers to many of the most common questions we receive about CellStream’s consulting services, technical training programs, online courses, and industry expertise.
In addition to information about our products and services, you’ll find helpful explanations, technical guidance, and answers to a variety of networking and computing topics. If you don’t find what you’re looking for, we’re always happy to help—simply contact us and we’ll do our best to provide the information you need.
We hope you find these resources informative, practical, and valuable in your professional and technical journey.

If I want to get into Networking, what should I learn?

Post Views: 2,204 I was recently (this was 2017) asked the question “If I want to get into Networking, what should I learn?” If you want to see the 2025 answer – click here. A great question because Telecommunications or Data Networking is really not a degree program at most universities, at least not at

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How do I reset my “Default” profile in Wireshark?

Post Views: 5,101 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 This is a commonly asked question that usually results from users learning the can have different profiles after they have spent months constantly changing the default profile!

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What are some network related command line tools within Windows?

Post Views: 2,434 This is a great question.  The latest list (when this was written) is: Arp – Displays and modifies entries in the Address Resolution Protocol (ARP) cache, which contains one or more tables that are used to store IP addresses and their resolved Ethernet or Token Ring physical addresses. There is a separate table

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Where we are in the USF?

Post Views: 1,890 In short, things are advancing quickly. Readers may also be interested in watching the Senate hearing on the subject. http://commerce.senate.gov/public/index.cfm?p=Hearings&ContentRecord_id=fc757765-b147-4f14-9e01-754721a5cffd&ContentType_id=14f995b9-dfa5-407a-9d35-56cc7152a7ed&Group_id=b06c39af-e033-4cba-9221-de668ca1978a   Further, I offer the following: Dear OPASTCO Member, Last week, the Federal Communications Commission (FCC) delivered its first Notice of Inquiry (NOI) and Notice of Proposed Rulemaking (NPRM) on the recommendations

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Where can I find the information on securing a home network?

Post Views: 1,711 This procedure has moved from our Online School and is now described in an article at this site. We actually have several articles! Here is the original article: click here. Here is an article on securing Wi-Fi in your home or small business:  Click here to browse the article! I hope you

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Where can I find information on writing secure code?

Post Views: 2,548 Great question received just before the holidays. The security of software is paramount, especially in any communications systems (routers, switches, servers).  We are all fimiliar with “patch Tuesdays” as efforts to thwart security holes in software are a constant. Surprisingly, few Computer Science majors include skills on secure coding.  Furthermore, policies and

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