IWL's Expert Insights on Network Emulation and Protocol Testing
A Graphical Network Simulator for Windows
Why should I use the KMAX Network Simulator when Windows 10 has a built-in mobile network emulator? Unlike the Windows Phone Emulator, the KMAX Network Simulator emulates the network conditions that will confront all mobile devices on all types of networks (not just 3G/4G cellular), under both typical and adverse network conditions …
Jeopardize Democracy Over a Few Lines of Code
The Los Angeles Times reported today that "More than 23,000 Californians were registered to vote incorrectly by state DMV." This error should have been caught in BETA testing when voter input was compared with data to be sent to the DMV. Was such a test designed and planned? Was this type of BETA test executed? …
How to Create Awe-Inspiring Network Protocol Test Suites
The cost of computer security breaches is no longer hypothetical. According to the Cisco 2018 Annual Cybersecurity Report (page 46), more than half (53 percent) of all attacks resulted in financial damages of more than US$500,000 (for each organization), including, but not limited to, lost revenue, customers, opportunities, and out-of-pocket costs. Interestingly, about 19% of the attacks resulted in financial damages of more than US$2.5 Million per organization! …
Bandwidth Limiter Overview
Network bandwidth is the maximum data throughput in a specific segment of a digital communication system. For example, a wireless access point rated at 300 Mbps network bandwidth, will support data transiting through the access point at a rate no greater than 300 Mbps. Higher performance devices with data flowing through the access point would be "bandwidth limited" by the access point …
Are You Ready for the New Challenges of QUIC?
In 2013, Google announced a new transport protocol, the QUIC protocol (Quick UDP Internet Connections). QUIC’s original goal was to reduce transport latency, particularly with users of web apps (that use HTTP over TCP). The goal was later expanded to provide a reliable, connection-oriented, low-latency, fully encrypted transport layer. Approximately 0.9% of all websites use QUIC …
Understanding Network Emulators, Network Modelers, Network Simulators
Network emulators, network modelers and network simulators -- how do they differ? How do I know what solution would be right for my application? How do I compare an emulator vs a simulator? Modelers, simulators, and emulators represent a continuum, that begins with pure mathematical software models and moves towards the physical reality of emulation …
Measuring Bits and Gravitational Waves
How do you measure gravitational waves? How does that compare to counting bits in networking? In June 2017, IWL Staff attended a fascinating lecture by Dr. Jess McIver of CalTech titled "Einstein Gravitational Waves and Black Holes". Dr. McIver described the operation of the LIGO project for detecting gravitational waves. So when an article appeared on the history of the early efforts to detect gravitational waves, ultimately resulting in LIGO, we eagerly read it …
The Quandary of Event Notification: SNMP Traps
Newcomers to IT network operations are often confounded by the complexity of managing, controlling, monitoring, diagnosing and repairing their networks. As we are all inclined to select the simplest tool, to a networking newcomer, the simplest tool for staying on top of network operations would be an event report …
IWL Announces New Patent Licensing Program
IWL today announced a new patent licensing program for manufacturers and end users who use the technology of the Maxwell Patent. IWL is the owner of US patent number 7,310,316. The Maxwell Patent is directed to a test device placed between two or more nodes, in which the nodes communicate in conversations according to a predetermined protocol such as TCP/IP …
Replacing Your Shunra (now HP) Network Simulator?
Several years ago, an Israeli company called Shunra Software, offered a network simulator product. The product’s purpose: to help IT staff verify the performance of apps and devices, prior to deployment in production networks. In 2016, HPE sold the “software division”, including the HP Network Simulator, to MicroFocus.
So where does that leave HP Network Simulator? …
GRAV "Gateway Timeout" Issues
About a year ago we begin switching our various websites to use content management systems (CMS) that did not require SQL databases, or any database for that matter. We looked at GRAV and Hugo. The latter is highly portable and very fast, but for our more dynamic websites we decided to use GRAV.
In general we have been quite happy with GRAV, but recently we encountered a problem in which users began to see "Gateway Timeout" errors …
Internet Satellite Links by SpaceX -- We Have a Few Questions
The Washington Post recently published an article: "SpaceX wants to beam the Internet down to Earth. Here's How it will Start." IWL believes the article doesn't give the whole story. SpaceX is not proposing anything that is particularly new …