Hi everyone. I'm currently studying for IT Support, and I've been nailing all of my tests so far with a 80%+ success rate, with the exception of Chapter 6 which is essentially subnetting & IPv6. Despite putting extra effort & spending serveral evenings re-reading chapter 6, I only managed to get 60%. I've heard from my circle of hardware enthusiasts/IT Supporters that Chapter 6 is probably the hardest in the introductory course. I really want to nail this test properly. Do you know any educational website teaching subnetting? It's mostly questions on: IP Address x.x.x.x /24, calculating the /24 properly, I just can't make any sense of it. Being able to tell how many hosts that are available based on something like 255.255.255.224 If this is the wrong subforum, please do tell me Now, if you have any rule of thumbs with subnets, the /24 etc., I would greatly appreciate any information.