IP Addresses

• Key facts about IP addresses

  • IP addresses are used when sending data between TCP/IP networks (e.g. over the Internet) 
  • IP addresses are assigned either manually or automatically assigned before the device can access the network

  
• 2 versions of IP addresses

  • IPv4 uses a 32 bit address , and IPv6 uses a 128 bit address 
  • IPv4 uses a numeric dot-decimal notation and IPv6 uses alphanumeric hexadecimal notation
  • IPv6 was created due to the increasing number of devices that need unique IP addresses  
  • IPv4 has 2³² (over 4 billion) IP addresses , and IPv6 has 2¹²⁸ IP addresses  
  • IPv4 addresses must be reused , but IPv6 addresses can have a unique address

  
• What are IPv4 and IPv6 addresses translated/stored/split into

  • IPv4 addresses are split into 8-bit chunks and each one is given as a denary number  
  • IPv6 addresses are split into 16-bit chunks and each one is given as a hexadecimal number

  
• • Communication on the same network uses MAC Addresses 
  • Communication between different networks uses IP Addresses