What is a non-blocking switch?
How does Internet work - We know what is networking
It is fairly common to hear about switch being non-blocking. It’s because almost all switches today are non-blocking. But what that means? When I asked people around me on what exactly non-blocking switch means, they were unable to get to the same conclusion. I was going through a lot of different internet places and vendor documents before I wrote this here, but, do not hesitate to add something in comments if you have different view on the subject. Line-rate switch means the same as if you would said wire-speed switch. It basically means that this switch has the forwarding capacity that supports concurrently
Great News: My Workshops Are Available from NIL Data Communications
In the last few months I ran into a sweet problem: dozens of organizations would like to have on-site SDN, SDDC or IPv6 workshop. Obviously I had to turn many of them down, and my calendar is almost full till early November.
A week ago I also found a solution: my friends at NIL Data Communications will start offering the same workshops with their instructors.
Read more ...CCIE RS – it’s the payload, not the header
There is some actual content here, but first – a few drips of sap. The title is a nerdy rendering of the adage ‘its the journey, not the destination’. The decision to take time from study and blog had to do with this very thing – reserving time for reflection along the way. While taking […]
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The post CCIE RS – it’s the payload, not the header appeared first on Packet Pushers Podcast and was written by Quentin Demmon.
Contributing back to the security community
This Friday at the RSA Conference in San Francisco, along with Marc Rogers, Principal Security Researcher at CloudFlare, I'm speaking about a version of The Grugq's PORTAL, an open source network security device designed to make life easier and safer for anyone traveling, especially internationally, with phones, tablets, laptops, and other network-connected devices.
Portal uses open-source software and services to take inexpensive, commodity travel routers and turn them into powerful security devices. Since this is pretty far from CloudFlare's core business, it warrants a brief digression into why we support projects like this.
Computer security was for a very long time only of interest to hobbyists, academics, and obscure government agencies. Cryptography was an interesting offshoot of number theory, a foundational but very abstract part of mathematics, and many of the early infrastructure components of the Internet didn't include security at all -- there was an assumption that anyone who could gain access would be responsible and well-intentioned, a consequence of the academic origins; after all, why would they want to break or steal things which were freely available.
Before the "cambrian explosion" of commercial computer security, there was still a lot of great security research -- it Continue reading
VMware Touts Q1 Growth but Doesn’t Give NSX Numbers
An upbeat earnings report overall, featuring NSX, AirWatch, and vCloud Air.