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.

tshark Usage Examples

Post Views: 11,164 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 As many of you know, tshark is the command-line version of Wireshark, designed for packet capture and deep protocol analysis without a graphical interface. It uses the […]

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Using Coloring Rules in Wireshark

Post Views: 4,277 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 Using Wireshark Coloring Rules – Some Notes A great site with additional coloring rules offered to the community: http://wiki.wireshark.org/ColoringRules All default coloring rules are stored in a

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Removing Checksum Calculations in Wireshark

Post Views: 2,745 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 If the Wireshark host performs TCP and UDP checksum offloading – the process of calculating the checksum on the NIC and not by the protocol stack –

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What will be the Software Defined Networking (SDN) Skills Needed?

Post Views: 1,659 In 2012 and 2013, all the buzz in networking was about the emergence of Software Defined Networking (SDN).  Frankly, that buzz continues in 2014 and vendors continue to refine and define their role in this market segment.  Like a game of chess, the players are all stating their objectives, their product plans,

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Using Wireshark Temporary Colors to easily see a Conversation

Post Views: 1,499 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     We all know what a great tool Wireshark is.  One of the features added to Wireshark is the ability to temporarily colorize an Ethernet, IP,

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Downloading an HD Movie in 8 Minutes

Post Views: 1,498 Comcast revealed last year that it intended to deliver a special high speed option for Internet service at up to 105Mb/s.  An article in USA Today reports: “Extreme 105, [will be] available to consumers in more than 40 million homes in San Francisco, Seattle, Denver, Chicago, Boston, Philadelphia, Washington, D.C., and Miami,

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

Post Views: 4,309 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: 2,199 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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CSI-TB-005 – Software Defined Networking Technical Overview/Briefing

Post Views: 14,032   Half-Day Instructor Led Technology Overview/Briefing Available in either Web Based Delivery or On-Site DeliveryWeb Based Delivery: Max class size is 50On Site Delivery: Max class size is 30 Course Description: The half-day (4hr session if Web Delivery) Technology Overview/Briefing on Software Defined Network (SDN) Technologies, as part of the Technology Briefings/Emerging

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CSI-OL-006 – IPv4 Routing 101 – the basics with RIP, OSPF, and BGP

Post Views: 12,167    CellStream, Inc. – Telecom Consulting and Training!             4hr Online Self Paced course that must be completed within 30 days. Click Here to go to our Online Courses.     Course Description This Routing Fundamentals course is a fast start to understanding Internet Routing concepts and protocols.

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CSI-OL-005 – Understanding IPv4 Addressing and Subnetting

Post Views: 11,837    CellStream, Inc. – Telecom Consulting and Training!             4hr Online Self Paced course that must be completed within 30 days. Click Here to go to our Online Courses.     Course Description This course provides the essential knowledge and skills in handling IPv4 Addressing. Anyone working with

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CSI-OL-004 – Ethernet 101 – The Basics of Ethernet

Post Views: 11,837    CellStream, Inc. – Telecom Consulting and Training!             4hr Online Self Paced course that must be completed within 30 days. Click Here to go to our Online Courses.     Course Description This course is an introduction to to Ethernet, and Ethernet LAN principles and concepts. From

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CSI-OL-003 – Data Networking 101 – the packet networking essentials

Post Views: 11,650 CellStream, Inc. – Telecom Consulting and Training!  4hr Online Self Paced course that must be completed within 30 days. Click Here to go to our Online Courses category at our online school Course Description This course is an introduction to Data Networking principles and concepts. From understanding the layered model of communications

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CSI-OL-002 – Wireshark 101 Fundamentals

Post Views: 11,724    CellStream, Inc. – Telecom Consulting and Training!             4hr Online Self Paced course that must be completed within 30 days. Click Here to go to our Online Courses.   Course Type/Length/Size: 4-6hr Online Self Paced course that must be completed within 30 days. Click Here to go

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CSI-SP-005 – Telecom 101

Post Views: 23,416 CellStream, Inc. – Telecom Consulting and Training!  1-Day, Instructor Led, Web Based Delivery or Self Paced, Online Minimum: 10 Students Web Based Delivery: Max class size is 25 On Site Delivery: Max class size is 20 This course is also available as an 8 hour online class which must be completed in 30

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