Basic of internet

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 In this section we will talk about information security, ethical hacking. This is just an introduction with some of the basic basic concepts.
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🔥 MAC Address: (Media Acces Control) A unique 48-bit code that is assigned by the manufacturers of their network cards. This physical code is written to the EEPROM memory of the card and is used for the first authentication phase to a local network by a network device (router, switch, repeter, etc.) which then assigns a local IP address.

🔥 Note: The importance of not leaving a trace of a MAC address lies in the fact that this information is memorized inside the network devices, which do not always allow to delete the logs. This address will also be sent to the ISP (Internet Service Provider) which will store it in its own databases.

🔥 Hostname: The hostname is the name that we can assign to a device, with which it will be recognized within a network.

🔥️ IP address: Unique series of numbers that identifies a computer device connected to a network.
  ● Local IP: It is assigned by an internal network device (Modem, router), used to identify a device within a local network.
  ● Public IP: It is assigned by the ISP (Internet Service Provider), used to identify a network or an IT device. This address can not be edited but only hidden.

🔥 DNS: DNS are "alternative names" to IP addresses, in fact we could identify a specific target such as 192.168.0.1 and its corresponding DNS addressIPlocale.it (for example).
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