A lot has already been said about the 6-hour Facebook outage of 4th October 2021. Instead, I will take a different approach; visualizing it.
Being Network Engineers, most of you are able to talk for hours about Layers 2 to 7, but very little of us know what actually happens at Layer 1
Have you ever wondered why your nameserver does not allow you to put a CNAME Record at the zone apex?
DNSSEC is a suite of specifications for securing DNS. How do you enable your Windows DNS Server to Validate DNSSEC?
DNS is a critical infrastructure component of the Internet. How did it originate? How does it work? Who controls it? Is it secure?
There are no longer any IPv4 addresses available for allocation from IANA. This means that adoption of IPv6 is now of paramount importance.
BGP is one of the core protocols that drive the Internet, yet few people know what it is, yet alone how it works. In this post we scratch the surface on what BGP is and how it works.