I'd like to start reading about network security, does anyone know an overview document (about network security) that I can get from the internet?, if yes, please send me the the web address (URL)
There are many different web sites that have some sort of Network Security documentation. The best thing for you to do is to go to a search engine like www.google.com and type in "Network Security". This will pull up a multitude of information that you are looking for.
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