Our Information Security Officer, Joseph Ball has created a series of 12 easy to follow video tutorials which explore the many aspects of cyber security, here's the first 3 and we hope you'll enjoy watching them.
Denial of Service (DOS)
This means a function of the computer has been stopped, halted or slowed due to a resource getting overloaded or confused, this may be malicious or otherwise but has stopped the service from being accessible.
It's a bit like an elevator being installed that can't carry its payload or the weight of people. If there isn't enough resource in the steel tension and motors, it will not be able to perform its function
Distributed Denial of Service (DDOS)
This is an extension of DOS but is when multiple people or actors attack the resource. It's the same method of disrupting a service but it's not a single person you can block, track or monitor, it's several, and from anywhere in the world.
Going back to the elevator example. It's not a single person who has overloaded the motors, it's the volume of smaller and lighter items, or people, which break it.
Dynamic Name System (DNS)
These are essentially computerised versions of a huge phone system. They are an integral part of how most of us use the internet daily (without us even knowing). They are key to helping your machine understand what you mean by a browser request, for example 'Facebook.com', and why the industry is seeing headlines like 'SANS Institute: DNS attacks gaining steam in 2019'
How do these attacks work and what happens when they go wrong? What could an attacker gain from manipulating a DNS?
Coming Next in the Series...
Malware, Worms and Ransomware