Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. In telecommunications a block is one of: * A group of bits or digits that is transmitted as a unit and that may be encoded for error-control purposes. * A string of records, words, or characters, that for technical or logical purposes are treated as a unit. Blocks (a) are separated by interblock gaps, (b) are delimited by an end-of-block signal, and (c) may contain one or more records. A block is usually subjected to some type of block processing, such as multidimensional parity checking, associated with it. A block transfer attempt is a coordinated sequence of user and telecommunication system activities undertaken to effect transfer of an individual block from a source user to a destination user.

Данное издание не является оригинальным. Книга печатается по технологии принт-он-деманд после получения заказа.