On 3 February, 2011, the last top-level block of public Internet Protocol version 4 (IPv4) addresses was assigned. This means that the art of subnetting IPv4 addresses will soon be a skill of the past as we move to IPv6. For all of those who have spent hours understanding the significance of /22 (how many subnets and hosts per subnet, and what the subnet mask derived for this notation), Muller is sorry to say this will be a skill set that will go away in the not so distant future (of course they said that about Morse code, but he notes that we still use that as well).
One interesting facet of the IT industry is the need to learn new skills on a continual basis. New technologies are released all the time, and new operating systems seem to roll off the factory floor every 18 months or so. That means that IT professionals must continuously update their skills or end up becoming redundant.
This slideshow features 10 tech skills, identified by Randy Muller, MCT, MCSE, MCSA, MCDST and Global Knowledge, as heading the way of the dinosaur.