IT professionals require a large amount of knowledge to work in their field. While specific skills such as varying programming language knowledge, database standards, Operating System fundamentals, and proprietary program specializations are important one should especially focus on the fundamentals of information technologies. Namely, the differences and similarities between often confused concepts.
Synchronous and Asynchronous
Both synchronous and asynchronous forms of communication are a means of transmitting data. The main difference is in the format that the data is transmitted.
Asynchronous communications is the method of communications most widely used for PC communication and is commonly used for e-mail applications, Internet access, and asynchronous PC-to-PC communications. Through asynchronous communications, data is transmitted one byte at a time with each byte containing one start bit, eight data bits, and one stop bit, thus yielding a total of ten bits. With asynchronous communications, there is a high amount of overhead because every byte sent contains two extra bits (the start and stop bits) and therefore a substantial loss of performance (InetDaemon Enterprises, 2010).
Synchronous communications is the more efficient method of communications. CQ's connectivity solutions communicate through the synchronous method of communications.
Through synchronous communications, data is transmitted as frames of large data blocks rather than bulky individual bytes. One advantage of synchronous is that control information is easily inserted at the beginning and end of each block to ensure constant timing, or synchronization. Another advantage of synchronous is that it is more efficient than asynchronous (InetDaemon Enterprises, 2010). For example, a 56 Kbps dial-up synchronous line can carry 7000 bytes per second (56000/8) compared to a 56 Kbps dial-up asynchronous line which can... [continues]
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