In this article we will discuss Inside a Router – Router Infrastructure, will make brief discussion on Inside a Router. In last article we discuss about Router Memory – Storage of Router.
Inside a Router – Router Infrastructure
A router is a networking device that forwards data packets between computer networks. Although there are several different types and models of routers, every router has the same general hardware components. Routers perform the traffic directing functions on the Internet. Data sent through the internet, such as a web page or email, is in the form of data packets.
A router in actually a special-purpose computer. Not similar to your gaming computer but a computer nonetheless. Even though it’s not upgradeable like your laptop, a router also have CPU, RAM and boot disk. You can add RAM to some type of router, you also update the operating system inside, a firmware. I have seen router CPU overloaded because I messed up with routing, I also several times swap a router with my laptop because I can’t get a replacement fast enough.
The figure also includes images of other components found in a router, such as the power supply, cooling fan, heat shields, and an advanced integration module (AIM), which are beyond the scope of this chapter.
A router works exactly the ways your computer system works. A router have the following inside it: RAM, ROM, NVRAM (Non Volatile), Flash memory, and Operating System (IOS), and ports connectors.
As a purpose-built device, it has some very specific circuits called Application-Specific Integrated Circuits. Their role is to offload the CPU: they can do just a few simple tasks, but they can do it very fast and without involving the CPU. They are used to process packets as fast as possible. A networking professional should be familiar with and understand the function of the main internal components of a router, rather than the exact location of those components inside a specific router. Depending on the model, those components are located in different places inside the router.