In this book, we're going to discuss network attacks.There are many different types of threats out there and many of them carry out their attacks over your networks. These attacks include things like denial of service attacks, spoofing, hijacking, replays, transitive attacks, DNS attacks, and ARP poisoning.Now, before we get into all of those different typesof attacks, it's important for us to do a quick review of the basics of ports and protocols that you learned back in Network+.After all, the exam is going to focus on particular ports and protocols and how it's best to secure them.