This paper is about one of the functions of the data link layer, which controls access to shared media. The algorithm presented must be able to operate accurately and efficiently. In the approach focused on in this article, stations must specify the time of using services for access to the server. Then they will enter a system that arrives at the exit without any collisions; it will use the server based on the timing of the stations themselves. Many methods have been published on this, but in this paper .We tried a novel approach with its special features where the performance of this method is shown compared to other methods.

Social media are an important medium for exchanging information acting a vital role in today’s living edge. Social media are computer-mediated communication (CMC) technologies that facilitate the creation and sharing of  information, ideas, career interests and other forms of  expression dedicated to community-based input, interaction, content-sharing and collaboration via online communities and networks. In Italy more than 25 million of the population use social media among different generation for various purposes. Social media also claimed to have negative impacts on personality and physiological aspects of human beings, yet these statistics variables have not much been emphasized in previous studies. The objective of this paper is to compare and discuss the use of different social network platforms among Italians, specific purpose and to identify duration of usage. These finding will give us knowledge of the popular social media platform and usage among different age groups and to determine the usefulness and draw backs spending inordinate amount of time in social media usage among Italian population living in Italy.