Hi, I've been trying to organize my self, and has been making an order list, for beginners (as I am), of practical topics that should be studied to manage a communication node (ISP). Also, each topic should have referred books, urls and materials about it, in order of reading too. Here I ask you for some experienced help, to conform this, or some reference point where start on. The way you consider it must be done. My plan to learn is make a review of reading from start to end of it to get an overall idea of the topic (as a whole), and then go increasing the level of specification in each topic on each review reading. So the topics' ordering and the topics 'em selves are very important. Could this be right, any suggestion at this point would be highly appreciated too? So my starting list, 1. Introduction to Internet: The bases, and general ideas of where we are standing. At this point I started with Douglas E. Comer's Internetworking with TCP/IP Vol1 2. Firewalls: To grant security in place before start. 3. DNS: 4. Proxy: 3. Mail: 4. Web Server: 5. FTP Server: And of course CentOS-Linux to deploy all this. Any suggestion? Any idea? Anything will be appreciated.