Nowadays almost every industry is knowing a rapid development and the aviation industry is no exception thus it is crucial to enhance the focus on network security concerning new Aircraft Data Communication Systems, seeing that the current networks, regarding deployments, are mainly wired technology. Based on the above, many aerospace working groups have already begun actualizing the idea of creating an AWN (Avionic Wireless Network). The main purpose behind the idea is to minimize both the power consumption and financial costs, not to mention the difficulty of wiring (weight, design, etc…) which will make possible using mobile devices. An optical network design is also suggested as an alternative for the usual on board networks in the upcoming avionic systems. In the following lines, we will discuss the relevance of these technologies, regarding avionic requirements, in order to select the best and most reliable one(s).