Telecommunications Consulting Services
Consulting Services from Network Design to Project Management
Check Out our Consulting Services
Internetworking Training Experts
Training and Learning Services focused on the technology that makes the Internet work.
Check Out our Learning Services
Wireshark Experts
Packet analysis expertise is critical in today's networks, and being able to use the best packet analyzer application is a skill we can help you and your team attain.
View Our Wireshark Classes
Are you a Network Scientist?
If you are just getting started in networking or you have been in the industry/technology for years you know there is so much to learn and so much to explore in networking technologies. Explore our vast collection of articles and reading.
Read More
Online Certification Training
Find out about our Network Self Certification Program for Rural Service Providers at the Online School of Network Sciences
Check Out Our Program at our Online School
Previous slide
Next slide

Welcome to our home on the Internet, where we can not only share information, but also interact with each other. If you are a visitor to the site, there are a number of things to view: our FAQ’sNetworking and Computing Tips, our CellStream Blog, and other fun reading can all be found in the drop down menus above.  The Training menu provides access to our coursesour course calendar, and learning services.  The Consulting Menu provides information on our consulting services and a place to meet our consulting and teaching team.  Registered CellStream folks and our clients will log in using their private credentials to access projects, calendars and discussions.

Thanks for visiting! We always welcome comments and suggestions.  You can also join our Discord Server here!

The Network Products We Use in Our “Go Bag”

Post Views: 360 The links to the products shown here are all available through Amazon, and if you use these links, we will get a small cut through our Amazon Associates program. We thank you for doing this. I often get asked for a list of products that are in my “go bag”, when I

Read More »

Which Version of TCP are you using?

Post Views: 419 So often in Wireshark videos and classes we spend a lot of time on TCP behavior. But what I am about to discuss is hardly ever brought up. The answer to version is simple right? Version 4. OK, kind of right, but overlooking too much. The truth is that there are multiple

Read More »

Why TCP Should Never be Used for Speed Tests

Post Views: 357 I understand the argument: Since there is so much TCP (HTTP anything, etc. etc.) this is what the user experiences. That argument has several issues. First, we need to discuss the problems with using TCP at all as there are technical reasons the idea does not align with the goal of speed

Read More »

Recognizing WLAN Retransmissions is a Critical Skill

Post Views: 342 Retransmissions of frames in WLANs (Wireless Local Area Networks) can become problematic for several reasons, primarily due to the nature of the wireless medium. While retransmissions are a necessary part of ensuring data integrity in unreliable networks, they can cause inefficiencies and degrade network performance. I will get to the details below,

Read More »

The Signal to Noise Ratio (SNR) Calculation

Post Views: 1,010 Signal-to-Noise Ratio (SNR) is a measure of how strong a signal is compared to the background noise in a communication system. It is typically expressed in decibels (dB). The higher the SNR, the clearer and more reliable the signal. I often get asked, how is signal to noise calculated. Frankly the math

Read More »

Automatically Switch Configuration Profiles in Wireshark

Post Views: 525 As most of my readers, students, and clients know, I absolutely love Wireshark. I deeply am infatuated with Wireshark’s Profiles, more properly called configuration profiles. So much so that many years ago now, I set up the first Wireshark Profiles Repository. 100’s of thousands of downloads have resulted, and I hope I

Read More »
Find Articles by Tag
Wireshark (112)IPv6 (66)Wi-Fi (53)WLAN (46)Training (42)Security (31)Ethernet (27)Wi-Fi 6 (25)IPv4 (24)Voice (24)Cybersecurity (24)Linux (20)MS Windows (20)CellStream (17)Packet Capture (17)Windows (16)TCP/IP (15)BGP (13)OSPF (13)Troubleshooting (12)MPLS (12)Services (12)Networking (11)ARP (11)STP (10)VLAN (10)101 (9)L2 (9)Tools (9)1-Day (9)Advanced (9)TCP (9)L3 (8)tshark (8)Technicians (8)MAC Address (8)LLC (7)Cheat Sheet (7)QoS (7)Consulting (6)Internet (6)Hands On (6)Profile (6)Routing (6)Monitor Mode (5)RFMON (5)QUIC (5)Firewall (5)Tunnel (5)Command Line (5)Cisco (5)Telecom 101 (5)iSCSI (4)Top 10 (4)Display Filter (4)CBRS (4)Speed Test (4)IOS (4)Policy (4)Overview (4)NVMe (4)LAN (4)netsh (3)Testing (3)NIST (3)Blog (3)SAN (3)RDMA (3)MAC (3)Scanning (3)Networking 101 (3)Cisco IOS (3)pcap-ng (3)Online Course (3)Wireless (3)Traceroute (3)Travel (3)Network (3)VM (3)Subnetting (3)ICMP (3)EIGRP (3)Broadband (3)Service Provider (3)Toolkit (2)Tool (2)Privacy (2)Service (2)Design (2)VirtualBox (2)Certification (2)Zero-to-Hero (2)Bio (2)RFC's (2)Security Techniques (2)VXLAN (2)Email (2)Briefing (2)Monitoring (2)Bandwidth (2)Ubuntu (2)L2VPN (2)Decryption (2)FCC (2)L1 (2)Utilities (2)Wi-Fi 7 (2)Outage (2)Terminal (2)Analysis (2)CPI (2)DNS (2)Andrew Walding (2)GitHub (2)Fundamentals (2)Home (2)pcap (2)Facebook (2)Wi-Fi Scanner (2)WinFi (2)iptables (2)MAC OS (2)VPWS (2)Ultimate (2)Customer (2)Web Based (1)Fragmentation (1)SYN Flood (1)VI/VIM (1)PMTU (1)Course (1)Winston (1)Zoom (1)Business Plan (1)Business Case (1)MyRoom (1)Webex (1)pktmon (1)ACL (1)Anonymize (1)Passwords (1)SYSCTL (1)Zoomit (1)Ping (1)White Paper (1)Documentation (1)ND Table (1)ND (1)Default Profile Wireshark (1)nmap (1)netcat (1)AutoQoS (1)Port Mirror (1)useradd (1)ISATAP (1)Repository (1)Logging (1)M-BGP (1)ASN (1)Teredo (1)Tracewrangler (1)AS # (1)Extension Headers (1)About (1)Reading (1)HTTPS (1)Vision (1)China (1)ASCII (1)Hack (1)Art (1)FBI (1)VoIP (1)Fonts (1)Humor (1)SWOT (1)April Fools (1)SDN (1)Quiz (1)Process Explorer (1)L3 VPN (1)Air Quality (1)Airplane (1)MPLS-TE (1)Presentation (1)Bibliography (1)CSR (1)Cable (1)L4 (1)Lessons (1)iPerf (1)L2 VPN (1)IPsec (1)VPN (1)Packet Diagram (1)Packet Comment (1)Lab (1)Map (1)Bloom (1)Block (1)Content (1)Addressing (1)Powerpoint (1)Macro (1)Next Hop Self (1)Submarine (1)Redaction (1)Taxonomy (1)Disable (1)What we use (1)CERNET2 (1)Free (1)Online (1)Requirements (1)Architecture (1)RFP (1)Brainstorming (1)Billing (1)SS7 (1)Airlines (1)Multicast (1)IPTV (1)Product (1)3-Day (1)L3VPN (1)5-day (1)Flying (1)OOO (1)Story (1)Code of Ethics (1)Virus (1)Physical Layer (1)hping3 (1)Packet Crafting (1)Tri-band (1)Earth Status (1)6to4 (1)Data Networking (1)Social Responsibility (1)Technician (1)OTT (1)Roku (1)Netflix (1)Vudu (1)Youtube (1)Resume (1)Cutting Cable (1)ufw (1)Quotes (1)Rule (1)Math (1)Equation (1)carving (1)parsing (1)Value (1)Retransmissions (1)UDP (1)Signal to Noise (1)TCP CUBIC (1)Compound TCP (1)Remote Desktop (1)RDP (1)Colasoft (1)Our Go Bag (1)Products (1)TCP New Reno (1)5 Monkey (1)SNR (1)tcpdump (1)Life (1)Observations (1)Graphics (1)Animation (1)Adult Learning (1)2-day (1)Traffic Engineering (1)Automatically Switch (1)TE (1)Milky Way (1)Flight Tracker (1)Telephony (1)Switching (1)Courses (1)Capture Filter (1)Galaxy (1)Cost (1)CrowdStrike (1)NAT (1)Links List (1)Root Cause (1)Virtualization (1)Parrot (1)ECMP (1)News (1)Skills (1)Telecom (1)tracert (1)Web-based (1)Wi-Fi 5 (1)SIP (1)SDP (1)RTP (1)RTCP (1)Hackathon (1)Temporary Addresses (1)Data Center (1)Spanning Tree (1)mergecap (1)Text Strings (1)Discovery (1)Etherchannel (1)SCSI (1)Netmask (1)RIP (1)Ansible (1)dumpcap (1)Benchmark (1)AI (1)Artificial Intelligence (1)NVME-oF (1)Macros (1)Ring Buffer (1)Packet Voice (1)CPU (1)NPAT (1)Fiber Channel (1)Alternatives To (1)Trace files (1)Network Monitoring (1)Net Admin (1)Sys Admin (1)SD-WAN (1)whois (1)gQUIC (1)Wi-Fi Analyzer (1)ARP Probe (1)Gratuitous ARP (1)RARP (1)Reverse ARP (1)ATM (1)MPLS L3VPN (1)Frame Relay (1)ARP Announcement (1)Packet Analysis (1)Reconnaissance (1)Switch Port (1)Supply Chain (1)NIST SP 800-161 (1)SCRM (1)NIST SP 800-171 (1)CUI (1)ISO (1)ISO/IEC (1)Spoofing (1)ISO/IEC 27008 (1)Network of Things (1)NoT (1)Archive (1)Wayback Machine (1)Research (1)Assessment (1)NIST SP 800-183 (1)Twitter (1)
Show More Show Less

Upcoming Events and Classes 

To see the full calendar click on View Calendar below.  WBD = Web Based Delivery

Contact Us Here


Please verify.
Validation complete :)
Validation failed :(
 
Your contact request has been received. We usually respond within an hour, but please be patient. We will get back to you very soon.
Scroll to Top