To secure the Internet infrastructure, every developer must take a security stance - to audit every line of code, to use proper API and write code that correctly and safely as possible. To achieve this goal, the examples presented in this book are implemented with an attitude of safety. For example, this book recommends against the use of several IPv6 standard APIs - unfortunately, there are some IPv6 APIs that are inherently safe, so the book was trying to avoid (and prevent) the use of these APIs. * Includes protocol recently adopted by the Department of Defense for the future system * In connection with security issues, including spam and email, by presenting the best programming standards * Fully describe IPv6 socket APIs (RFC2553) using real world examples * Allows for portability for UNIX-based operating system, MacOS X, and Windows XP