Sometimes the most elementary of questions yield teachable moments; read on as we delve into how a single digit change between 127.0.0.0 to 127.0.0.1 offers a chance to look at network topology.
The Question
What’s the Difference Between 127.0.0.0 and 127.0.0.1?
I know that both are loopback IPs, but they have another ip mask.What’s the difference between them? Can they be used interchangeably?=========================================================================== IPv4 routes =========================================================================== Active routes: Destination Mask Gateway Interface Metric 0.0.0.0 0.0.0.0 192.168.1.1 192.168.1.6 26 [...] 127.0.0.0 255.0.0.0 On-link 127.0.0.1 306 127.0.0.1 255.255.255.255 On-link 127.0.0.1 306
What kind of information can we tease out from this table?
