Hi Everyone, This is more a question for those dealing in IT in a business/corporate sense. I'm working my way through these MTA exams at the moment, and I've found that most of the course material feels quite out of date. I've already completed Exams 98-366 (Networking Fundamentals) / 367 (Security Fundamentals) both with 96/98% respective pass marks. I've also passed Server Admin Fundamentals with 94% pass. Windows Fundamentals - Has at least updated the exam to cover Windows 10. Security Fundamentals - Some is relevant, some (like WEP, etc) is no longer relevant. Networking Fundamentals - This has some (what I feel would be) really out of date stuff in it. E.g Hubs, 10 Base T connections, Frame Relay/X25 connections. I've spent a lot of time on the Networking side of things, and am unsure if I'm wasting time on things no longer relevant. E.G I've aced understanding of IPv4, IPv4 classes, DNS/DHCP/Routing/etc. I've aced the OSI models (7 layers and 5 layer models) and understanding of them. I've just got my head around hex/binary/decimal conversions and subnetting (as well as CIDR/Subnet masks). Currently brushing up on IPv6. My questions are: a) How much of subnetting (classful/classless), as well as OSI model knowledge, and IPv4 is really used these days in the real world though? Is there really much binary/hex to decimal and vice versa done in everyday business IT, or is that really only if one aspires to be a network engineer? Is there something network related I should be really focussing on in todays era? b) Is there a good site where I can put all this knowledge to the test (or is passing the MS Fundamentals exams pretty much it)? I've already done the GMetrix Practice Exams (did them before completing MTA exams). Have also been using www.subnettingpractice.com Just trying to prioritise my time in regards to what I should be spending time on, and what truly is important to study indepth on. Thank you for your time and replies.