What Causes Satellite Loss and Error?
Forward Error Correction (FEC) A standard network approach to error correction is to send data, then wait for an acknowledgement (ACK) from the receiver and if none is received then resend the data. Well at least that’s it at its most simple. This kind of system is used by the TCP
7 Things You Need to Think About When Choosing a WAN Emulator
For years, people talked about “WAN Emulators” because basically you had your own network: the LAN (Local Area Network), and everything else was connected using the WAN (Wide Area Network). The WAN Emulator was/is a device or software that lets you actually run your application in the LAN “thinking” it’s
How to Prepare Your Applications for Every Network
With a trend towards server consolidation, virtualization, cloud computing, increased remote working and greater reliance on wireless technology, more applications than ever before are being deployed over Cloud, Wide Area Networks (WANs), (A)DSL, GPRS, 3G/4G, Radio or Satellite networks, and more. However, despite this trend, a glaring problem remains in
Working (And Playing) From Home!
Propelled by the outbreak of Covid-19, working from home went from being an occasional exception to an immediate necessity overnight. But how did this sudden change impact the average worker, who's home networks were designed for occasional use instead of constant work? Frank Puranik digs deep into the realities of
Guest Blog – Traffic Impairment in a Virtual Environment
A comprehensive explanation from our Australian partner, Matrium Technologies, on how to use iTrinegy’s Virtual Appliance network emulators to address the question “How can we make our applications experience real-world network conditions?” while performing QA in a sandbox environment.
Non-Functional Testing: An Imperative for Shifting Left
By Frank Puranik – Senior Technical Specialist If you’re anything like a lot of customers whose software testing departments I’ve spoken to you’ve just rolled your eyes at the title: “We haven’t even got our functional test fully sorted out. How can we possibly start on non-functional testing”. The answer
What is Satellite Jitter and should we care about it?
What is Jitter and should we care about it? This blog is Part 2 of a 3 part blog and concentrates on jitter (variable latency). Part 1 dealt with distance, latencies and orbits and subsequent parts will discuss the effect of atmospheric conditions and choice of wavebands. First, it’s
Why is satellite latency high?
Why is satellite latency so high? (and it’s not all to do with distance) This blog is Part 1 of a 3-part blog and concentrates on high latency, the subsequent parts will discuss jitter, the effect of atmospheric conditions and choice of wavebands. If we want to our applications
5G – It’s not about the “G”s!
Unsurprisingly, there’s a lot of buzz around 5G at this week’s Mobile World Congress trade show in Barcelona, Spain. But believe me, the 5G wireless network isn’t going to be the panacea that many expect it to be. Bob O’Donnell of TECHnalysis wrote an great report “The Messy Path to
To work dependably IoT Systems must be network-tolerant
There’s a cycle in technology where people figure out that you can make money out of something and so everyone jumps on the bandwagon. You know .com, e-commerce (in fact e-everything), SaaS (and its forerunner ASP), the Cloud, Big Data… Though the bandwagons come and go, some practical technologies usually
Why You Need to Embrace Operational Testing
It’s that time of year when we see a whole raft of articles telling you the “Top 10” things you must do next year to succeed. One thing that will probably be missing, although it really shouldn’t be, is incorporating effective operational testing into your software development & testing cycle.
Testing over networks is much more than a check box exercise
It was great to attend The National Software Testing Conference held in London recently, both as an exhibitor and a speaker. I really love this type of event as they provide a great opportunity to talk to professionals, in this case software test professionals, who are “at the coalface”. During
5 Minutes with… David Skingsley, Chief Architect at iTrinegy
What was your first job in IT? I started out in British Telecom’s Research and Development department. They needed a system to help manage the transition of systems and processes and my job was to program various modules. How did you first get involved with Network Emulation & Profiling? Among
How will IoT devices or systems cope with the crowded network?
It is estimated that there are already 14 billion objects connected to the Internet, so that is currently more than 2 devices per man, woman and child in the world today. Industry analysts are projecting that this could rise to anywhere from 20 billion devices to 100 billion by 2020
Making Software Defined Test Networks Available to Everyone
At iTrinegy we used to build Network Emulators, and we still do. But that sounds like something that a boffin scientist might use, not a regular IT person. So it’s worth taking a step back… … with the Network now being an integral part of almost every app(lication) – btw
The Importance of Virtualization to the Market
Last week we launched, to great fanfare, our virtual version of our NE-ONE network emulator, for VMware in the first instance. For us as iTrinegy, this was a land mark moment, expanding our product suite into the virtual world and delivering another technology first. Some may not have shared our
Great that Apple recognizes the need for proper network testing of iOS Apps during development; in so far as it goes…
I recently came across a report by Geoff Huston, Author & Chief Scientist at APNIC (Asia Pacific Network Information Centre) from the recent Apple Developers Conference which mentioned that Apple are adding network emulation capability to their Mac OSX platform, allowing a developer to create a personal Wi-Fi hotspot to
APM It’s all about the Speed – We are no longer prepared to wait!
We have all been aware of the importance of managing performance for many years and traditionally the main focus has been on the availability of our internal systems (systems/server application management). APM on the other hand is helping companies to gain a good understanding of their application performance and a
It’s Just Horse Sense — Build an Emulated Network
Speaking with delegates at a Cloud World Conference, I discovered that many are still taking a chance with their mission-critical applications. There seems to be a belief that in order to discover how their apps will work in a real world network, like a WAN or Cloud network, their only
The Confusing Flavors of APM
Attending Interop in Vegas last month, I was surprised to note the number of vendors exhibiting their wares under the banner of APM – Application Performance Management. With all the different offerings, it was rather confusing. It got me thinking about a trip I’d taken the night before to an
Which APM? – The Choice is Yours
Application Performance Management (APM) tools are really coming into focus as a result of cloud computing, agile development, virtualization, and mobile device adoption. We are seeing the industry really embracing “networked applications” and, as such, there will be a great need for these apps to perform well in the network
Transparent Monitoring – The Order of the Day
I’ve been pondering the on-going issues around transparency within the electric and heating utility services, and to be honest I’m a bit confused. I’m offered documents that try to explain it all but it’s written in a way that, to be honest, is less transparent than my bill! Through working
Remote-Controlled Passenger Airliners – The Strongest Argument Yet for Data Link Testing!
That the military have been remotely controlling UAVs (Unmanned Aerial Vehicles), often hundreds or even thousands of miles away from where the vehicle is actually operating is nothing new. So far, the UAVs that have been deployed have been quite modest in size. But eventually, this technology will, most likely,
Software outages happen – but can we reduce the risk?
Testing has often been the poor relation, an afterthought, but things are changing, over the past few years outages have really impacted customers. Last week a computer outage at United Airlines delayed thousands of travellers (see the full Boston Globe Story) and earlier this year RBS had a software failure due
Did Barclays test the performance of their Online Banking Web Site?
The BBC reports that following a site rebuild, 10% of Barclays Online Banking customers are experiencing very long log-in times. So we called a few people we know who use the service and, while hardly a comprehensive sample, it appears that they all encountered lengthy delays. Our very qualitative initial
It’s Worse than that Jim – Bandwidth is not equal to Link Speed either.
In a recent blog my colleague, Phil Bull notes that there’s confusion over bandwidth and speed. This discussion started with an article on Network World’s website where Netforecast said “No Matter What the FCC Says, Bandwidth Is Not Speed”. Basically the FCC were bandying the term speed and bandwidth pretty