What is a networking packet?

As we use the internet to send and receive data, it is crucial to understand the underlying mechanics that allow this to happen. One of the most fundamental components of this process is the packet. In this blog post, we’ll …

A tool to find out if BGP is lying to you

APNIC has a bog article on detecting “bgp lies”. https://blog.apnic.net/2021/05/24/a-tool-to-detect-bgp-lies/Do you ever wonder whether you can really trust other networks, such as your provider(s) and peers? More precisely, wouldn’t you like to be able to tell if the traffic you send always …

Common ISP outage causes

Over the years I have been able to narrow the most common reasons a service provider goes down or has an outage. This is, by no means, an extensive list.   Let’s jump in. Layer1 outages Physical layer outages are the …

New Speed Test server for Patreons

This content is for Patreon subscribers of the j2 blog. Please consider becoming a Patreon subscriber for as little as $1 a month. This helps to provide higher quality content, more podcasts, and other goodies on this blog.To view this …