The three main methods of data communication are: Simplex transmission allows data to flow in only one direction. It is like a radio broadcast. The sender transmits information but the receiver cannot respond. Half-duplex transmission lets data travel in both directions but only one way at a time. It’s similar to how people use walkie-talkies. … Read more
From a usage viewpoint, there are three main types of files: Each type serves a different purpose in data management and system operations.
A file is a collection of related records treated as a single unit. It represents one attribute or characteristic of an entity. In a table, a field appears as a column header. For example, in a student database, fields might include name, age, grade, and address. Each field has a specific data type, like text … Read more
A field is a column in a relational database table. It represents an attribute of an entity. In tables, fields are represented as column headers. For example, in a student database, fields might include name, age, grade, and address. Each field has a specific data type, like text or number. Fields are the basic units … Read more
Data processing is converting data into information or knowledge. It usually involves automated computer processes. It manipulates data to achieve a required objective such as sorting, calculating, classifying, or summarizing. Data processing transforms raw input into a meaningful output that can be used for analysis, reporting, or decision-making.
Information is the result of processing data. It is meaningful and typically serves as the output of a process. For example, a student’s grade in a particular subject for a semester provides complete information about their performance. Information has context and relevance which making it useful for decision-making.
Data is raw facts and figures. It can be numerical (like inventory figures or test scores) or non-numerical (such as names and addresses). Data gives information about past activities. It is used as input for processing in organizations.
The type of cable that communicates binary data are Ethernet cables (like Cat5e or Cat6), coaxial cables, and fiber optic cables. These cables transmit binary data, which is made up of 0s and 1s. These cables allow them to exchange information between devices.
Routing protocol communicates data between routers. Examples include OSPF (Open Shortest Path First), BGP (Border Gateway Protocol), and RIP (Routing Information Protocol). These protocols help routers determine the best path for data to travel across networks. It ensures that information reaches its destination efficiently.
Protocols in data communications define the rules for data exchange between devices, such as computers. They ensure data is sent, received, and understood correctly. Protocols handle tasks like error detection, data formatting, and synchronization. By following protocols, devices from different manufacturers can communicate efficiently and securely.