Data Communication

                   Types of Network Ø   A LAN is a network that connects computers within a limited area like a home, school, or office. Ø   It typically uses Ethernet or Wi-Fi for connectivity. Ø   LANs allow sharing of resources such as files, printers, and internet connections. Ø   It is usually high-speed and provides a secure connection within the localized area. Ø   A WAN spans a large geographic area, often connecting multiple LANs. Ø   The internet is the largest example of a WAN. Ø   WANs use long-distance communication links like satellite, leased lines, or public networks. Ø   They are slower than LANs and often involve higher costs due to the distance and technology used.   Ø   A MAN covers a larger area than a LAN but is smaller than a WAN, usually a city or a campus. Ø   It is often used by organization...

  Computer Monitors There are several types of computer monitors available, each with its own advantages and disadvantages. The main types include CRT, LCD, LED, OLED, and specialized monitors like curved, touch, and gaming monitors.  Here's a breakdown of the different monitor types: 1. CRT (Cathode Ray Tube) Monitors: ·          These are the older, bulkier monitors that use a cathode ray tube to project images.  ·          They are less common now due to their size and energy consumption.          2. LCD (Liquid Crystal Display) Monitors: ·          LCD monitors are the most widely used type, known for their relatively thin profile and lower power consumption compared to CRTs.  ·          They use liquid crystals to block or transmit light, creating...

  Plotter A plotter is a specialized type of printer that produces vector graphics drawings by moving a pen, knife, or other drawing tool across the surface of paper or other materials. Unlike standard printers that create images from dots, plotters draw continuous lines, making them suitable for large-format output like architectural plans, engineering schematics, and detailed maps.  Key Characteristics of Plotters: ·          Vector-based Output: Plotters generate images by drawing lines based on vector graphics data, which allows for precise and scalable drawings.  ·          Large Format Printing: They are commonly used for large-format printing, such as architectural and engineering drawings, and can handle various media sizes.  ·          Drawing Tools: Plotters utilize different tools like pens, pencils, markers, or ...

    Printers Printers are categorized into two main types: impact and non-impact. Impact printers create an image by physically striking an inked ribbon against the paper, while non-impact printers use various methods like ink sprays, lasers, or heat to transfer the image without direct contact.  Impact Printers: ·          Mechanism: Impact printers use a print head that strikes an inked ribbon, pressing the ribbon against the paper to create the desired characters or images.  ·          Examples:  Dot matrix printers are a common type of impact printer.  ·          Pros:  Can create carbon copies, relatively inexpensive.  ·          Cons:  Noisier, lower print quality, limited graphics capabilities.  Non-Impact Printers: ·     ...