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Data Link Layer

Data link layer concerns about the media what we are using. It also cares about channels and their functions. This layer is the protocol layer that transfers data between adjacent network nodes in a wide area network (WAN) or between nodes on the same local area network (LAN) segment. The data link layer provides the […]

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History of Java

1990- Sun microsystems decided to develop special software that could be used to manipulate consumer electronic devices. 1991- After exploring the possibility of using the most popular object-oriented language C++, the team announced a new language named “oak”. 1992- The team, known as green project team by sun, demonstrated the application of their new language […]

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Physical Layer

Physical layer dose two things: it sends bits and receives bits. The physical layer communicates with directly with the various types of actual communication media. Different kinds of media represent these bits values in different ways. Some use audio tones, while others employ state transmissions-changes in voltage from high and low to high. The physical […]