From the course: CompTIA A+ Core 1 (220-1201) Cert Prep

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Routers

Routers

From the course: CompTIA A+ Core 1 (220-1201) Cert Prep

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Routers

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- Routers, routers, routers. Everything I have in front of me right now is a router. Routers are devices that filter and forward traffic based on IP addresses. Routers are the magic tools that we use to interconnect local area networks. So let's take a moment and think about how routers really work. So I've got one little router here. Now, this router has two connections. One of the connections connects to a network called 192.168.7.0, and he's got a built-in NIC, and his NIC is 192.168.7.1. The other side, we'll say this comes from a internet service provider, also has an IP address, but this comes from the internet service provider, and in this particular example, it's connected to 11.12.13.0 network, and he's 11.12.13.44. If we zero in on the router itself, what we're going to have, I'll have my router, and here are my two connections with their IP addresses. Rule number one, routers don't care where any packets come from. So let's say a packet's coming in from the internet and…

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