Networking Primer – Part 5.3: Network Layer – IP Routing

Map of The Internet

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Up until this point, all of the layers, addresses and other attributes we have discussed have conceptually existed inside either the source or destination node. We now need a mechanism for physically moving the data from point A and B. While it is possible and would provide a very simple solution to delivering data, having a single connection between each source and destination node isn’t feasible. This might be appropriate for a test system in a lab where we could use a cross-over cable to connect two computers together, but we would face insurmountable challenges if we tried to connect the billions of devices in the world together with one-to-one connections. We need to split down our global network into smaller interconnect pieces and it is at this point we introduce additional devices outside of the nodes that will […]