The long-awaited depletion of the Internet’s primary address space came one step closer to reality on Tuesday with the announcement that fewer than 10% of IPv4 addresses remain unallocated. The Number ...

The American Registry for Internet Numbers (ARIN) announced today that its free pool of IPv4 addresses has hit the "zero" level. The announcement signifies greater difficulty for organizations trying ...

With the last IPv4 addresses about to be allocated, the good news is that IT managers — at least in the U.S. and Europe — don’t suddenly have to get the next Internet Protocol working. The bad news is ...

I don’t know about you, but it has been a long time since my laptop was assigned a public IPv4 address. Most of the time my laptop has a private RFC1918 IPv4 address. Rarely does my computer have a ...

We just saw that the mask determines where the boundary between the network and host portions of the IP address lies. This boundary is important: If it is set too far to the right, there are lots of ...