Today, the standard methods for moving the network/host address boundary are variable-length subnet masking (VLSM) for host addressing and routing inside a routing domain, and classless interdomain ...

I'm doing a lab in Boson, where it gives you the topology with some ip addresses and then expects you to do show running-config to get the subnet mask, and get the Network Address, First Host, Last ...

When network problems seem to defy the laws of physics, you'd better know your way around the dark region below layer 3 Long, long ago, before I could tell the difference between a /20 and a /30, a ...