NAT Terminology

As discussed before, Network Address Translation, or NAT, is a process that involves translating Private IP addresses into Public IP addresses. There are different operations within NAT and understanding each of them requires understanding NAT… Read More »NAT Terminology

Why NAT?

Before we can discuss how NAT works, we must discuss the purpose of NAT and answer the question, “Why NAT?” In the original plan for the Internet, every host was meant to have its own… Read More »Why NAT?

ARP in 5 Minutes

Here is a quick video that teaches the basics of Address Resolution Protocol (ARP) in less than 5 minutes. If you want to go deeper on ARP and all of its variants, check out the Address… Read More »ARP in 5 Minutes

BGP Oldest Path

BGP is the predominant dynamic routing protocol used to exchange routes between different autonomous systems. BGP’s popularity lies in the Path Selection process which allows extremely granular control of the path for incoming and outgoing… Read More »BGP Oldest Path

Gratuitous ARP

We’ve talked about Traditional ARP, where a node is requesting another node’s MAC address. We’ve also talked about Proxy ARP, where a node is answering an ARP request on behalf of another node. Which brings… Read More »Gratuitous ARP