In a recent video discussing the “forgotten layers” of the OSI model (layers 5, 6, and 7), and my previous two videos on the OSI model, I referred to various “responsibilities” associated with each layer… Read More »The Truth about the OSI Model
Openssl v 3.0 released in Sept 2021, and one of the major changes was this one: Provider based architecture. A replacement for the old “engine” interface that enables much more flexibility and the ability for… Read More »Openssl 3.x and Legacy Providers
Recently I’ve been working on a Practical OSPF deep dive training course on Youtube. The content of the first module is available for free on Youtube: For those of you who prefer learning by reading,… Read More »OSPF Training Course – Module 1
Recently, I had the honor of talking to David Bombal about the TLS Handshake. We picked apart everything that occurs in the first few milliseconds every time you browse to an HTTPS website: In the… Read More »TLS Handshake Deep Dive with David Bombal
Back in January, I announced that my blog was selected as a finalist for Cisco’s 2021 IT Blog Awards. I’m happy to report that because of you, Practical Networking was voted into the Top 5… Read More »Cisco 2021 IT Blog Awards – Winner =)
I’ve been selected as a finalist for Cisco’s 2021 IT Blog Awards =). The award seeks to recognize blogs that provide Value, Credibility, and Consistency. When I first set out to create a blog, I… Read More »Cisco 2021 IT Blog Awards – Finalist
The world of modern cryptography is built upon the concept of Asymmetric Encryption, and the pillars of Asymmetric Encryption are these three algorithms: RSA, Diffie-Hellman, and DSA (Digital Signature Algorithm). But unfortunately, there are many… Read More »RSA, Diffie-Hellman, DSA: the pillars of asymmetric cryptography
One of the most common Interview questions for Networking related positions involves asking a candidate what occurs in order to move data through a Network. This is a great question to ask, because it requires… Read More »“Tell me everything that happens when you type google.com into a web browser”