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Network Hardware | O Level Computer Science 2210 & IGCSE Computer Science 0478 | Detailed Free Notes To Score An A Star (A*)

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  • Network Hardware
    • Network  means computer and devices that are joined together using wireless technology
  • Network interface card (NIC), router, and some transmission media required
    • Computer has an NIC within it
    • It can be attached separately as well
    • It can be wired or wireless
    • It will connect to a network
    • Each NIC has a MAC address (Media Access Control) Address
    • MAC address is assigned by the manufacturer and not changed normally
    • Two main parts
      • Manufacturers ID
      • Serial code for the device
      • Unique address for each device
      • Hexadecimal value
      • Colon to separate them
      • We can inspect from which device the data was sent over a network
    • Router
      • Reads each data packet that is receives
      • Then the destination of the packet is determined
      • MAC address can be used to do so.
      • Normally only be used if data sent to another device
      • Same local network
      • Connect a device or a local network to the internet
      • IP address of the destination device is read and used to forward data to the correct destination
      • IP address also used to locate a device on the network
      • Unique address for a particular session only
      • IP address is assigned by the network
      • IPv4 or IPv6 structure
        • IPv6 uses hexadecimal to allow more characters
      • IP address can be static or dynamic
        • Dynamic means IP changes every time you connect to a network
        • IP for a single session may not be unique as well
      • Static address
        • Same for each session
        • Internet Service Provider (ISP) determines the IP address
Hunain Zia

Hunain Zia has previously achieved considerable success in the high-school educational stream, gaining a massive 154 Total A Grades and 7 Major Distinctions, a process in which he broke/ set 11 different world records, including the most A grades ever achieved, most subjects ever appeared in, most distinctions, gaining distinctions across two separate boards (Pearson Edexcel and CAIE) within the same year/ ever, and even 19 hours of constant examination. All records stand intact today. Hunain pursued his Honors Accounting Degree from the prestigious Bentley University, and then completed an LLB (in Honors) from University of London. Currently, he manages multiple social and commercial projects, has founded digital streams and works tirelessly in the education sector.

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