Have a question about networking or computing? Hopefully you can find an answer here!
Frequently asked questions about the CellStream consulting and training services are answered here as well as number of other topics. If you would like to ask us a question, it is easy to contact us.
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As always seems to be the case, there are several ways to find the MAC (Media Access Control) address of your interfaces in Windows. I am going to try to make this easy and considerate of different versions of Windows out there. Using the Command Line To find the Windows MAC address from Command Line, …
I am often asked this question of where to access PCAP or PCAP-NG files so that folks can explore packet captures using Wireshark. I have always provided these resources in my Wireshark classes at the Online School, but thought I should also just list them here for public consumption. Look up the hashtag “captureeveryday” in …
Where can I get PCAP Packet Captures for Learning and Exploration? Read More »
How do I install / upgrade Wireshark in Ubuntu Linux? First things first – the Wireshark downloads page is here: https://www.wireshark.org/download.html I know I have put the answer to this in other articles over the years (like this one), but I think it is appropriate to answer the question directly and specifically. Installing Wireshark in …
How do I install / upgrade Wireshark in Ubuntu Linux? Read More »
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 Apparently this is a common problem, where on Windows systems you do not see any interfaces: There are a couple of things to try: 1. If you are using the …
How do I get Windows interfaces to show up in Wireshark? Read More »
I was recently asked the question “If I want to get into Networking, what should I learn?” A great question because Telecommunications or Data Networking is really not a degree program at most universities, at least not at the undergraduate level. There are some masters programs, but they are few and far between. In fact, …
If I want to get into Networking, what should I learn? Read More »
This is a great question recently asked by one of our students/clients when we said our ususal introductory comments that “No we won’t spam you”, and “No we don’t use the click model on our sites”. Let’s talk spam. We have never spammed our students/customers and we have an anti-spam policy. You are automatically …
Why don’t you employ the “click” model on your sites? Read More »
This question (really two questions) has been popping up quite a bit lately. Let me see if I can explain. First, let’s define what SD-WAN is. SD-WAN leverages the SDN concept of separating the control plane from the data plane and creating a controller running software that can enact control and policies on the network. …
This is a great question, and there is a building pile of learning SDN courses out there. Perhaps the most technical one we found, we loved, and thanks to the great folks at Georgia Tech, the lectures were placed in the public domain. We assembled those video lectures and added our own quizzes and labs …
We get this question often: I am new to Telecom, or I just started at a service provider, and I need to learn Telecom basics – how can I come up to speed? This is a GREAT question – and the truth is you need to get up to speed. In years gone by, Telecommunications …
Great question! One I have received many queries on lately. Let’s get some terms out of the way first: ACI = This stands for Cisco Application Centric Infrastructure, so it is not one thing, but rather a collection of things. From the Cisco ACI web page: Cisco ACI consists of: The new Cisco Nexus 9000 Series …
How does Cisco APIC and ACI fit in the SDN world? Read More »
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! Luckily …
How do I reset my “Default” profile in Wireshark? Read More »
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 for each Ethernet …
What are some network related command line tools within Windows? Read More »
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 concerning the high-cost …
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 find this article …
Where can I find the information on securing a home network? Read More »
