TAILIEUCHUNG - Data Communication Principles P2

In this switching mechanism, a circuit is allocated to every piece of complete information (called a call). This circuit allocation is all the way from the sending to the receiving computer or terminal. It stays in place throughout the duration of the call until the sending (or receiving) side signals that it is not needed any more. In more formal terms, we say that a fixed bandwidth is guaranteed throughout the communication session. | 11 Large File - Language format comparison with recipient - Break up into manageable slices - Sequencing and information integrity embedded in each chunk Routing Combat channel Link problem physical transmission In this example instead of emphasizing on signal type we care more about readability of the transmitted document. There is no need of format comparison breaking up in manageable chunks sequencing etc. in voice communication. Even functions common to both voice and file communications such as routing could have different implementations and following paragraph explains how. For speech communication the gaps in talk spurts occur naturally and form an essential part of information. It is necessary that these gaps be maintained at the receiving point. However such is not the case for a file that is stored in a directory at the sending end and would be stored at the receiving end in another directory. In other words if we use a different path for each data block of the file with a sequence number stamped on it we will not lose any information by having each chunk using different route. We can always look at the sequence numbers of the received data blocks and put them back in order. Not only that if we make quite small manageable chunks of file we can process them individually as if each one is from a separate user. So if one of the chunks is in error it can be requested again from the sending computer. In essence even though both voice and file transfer need routing the most suitable mechanism can be substantially different for the two. The most favorable way for routing voice data is what is called circuit switching. File like data on the other hand can best use chunk-based-switching called packet switching. Here s a brief account of each a detailed discussion will follow in Chapter 2 . . Circuit Switching In this switching mechanism a circuit is allocated to every piece of complete information called a call . This circuit allocation is all the way from

TỪ KHÓA LIÊN QUAN
TAILIEUCHUNG - Chia sẻ tài liệu không giới hạn
Địa chỉ : 444 Hoang Hoa Tham, Hanoi, Viet Nam
Website : tailieuchung.com
Email : tailieuchung20@gmail.com
Tailieuchung.com là thư viện tài liệu trực tuyến, nơi chia sẽ trao đổi hàng triệu tài liệu như luận văn đồ án, sách, giáo trình, đề thi.
Chúng tôi không chịu trách nhiệm liên quan đến các vấn đề bản quyền nội dung tài liệu được thành viên tự nguyện đăng tải lên, nếu phát hiện thấy tài liệu xấu hoặc tài liệu có bản quyền xin hãy email cho chúng tôi.
Đã phát hiện trình chặn quảng cáo AdBlock
Trang web này phụ thuộc vào doanh thu từ số lần hiển thị quảng cáo để tồn tại. Vui lòng tắt trình chặn quảng cáo của bạn hoặc tạm dừng tính năng chặn quảng cáo cho trang web này.