CCNA

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

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

Proxy ARP

We’ve discussed the use cases and role of traditional ARP in the prior article of this series. In this article we will discuss Proxy ARP and its role and significance. Proxy ARP occurs when one… Read More »Proxy ARP