In the early 1990s, internet engineers sounded the alarm: the pool of numeric addresses that identify every device online was not infinite. IPv4, the fourth version of the Internet Protocol, used ...

Just about everyone in the IT business has heard the promises of IPv6. Why continue leasing Class A blocks to individual companies when most companies have to beg for a Class C block of 256 IP ...

For the most part, the dire warnings about running out of internet addresses have ceased, because, slowly but surely, migration from the world of Internet Protocol Version 4 (IPv4) to IPv6 has begun, ...

When the ARPANET was designed in the late 1960s, it was outfitted with a Network Control Protocol (NCP) that made it possible for the very different types of hosts connected to the network to talk ...

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 ...