IP addressing

An IP address is a 32-bit identifier for host and router interfaces

  • The interface is a connection between host/router and physical link
    • Routers typically have multiple interfaces
    • Host typically has one or two interfaces (e.g., wired Ethernet, wireless 802.11)
  • IP addresses are associated with each interface
  • An IP address is represented as a sequence of four bytes in decimal. Each byte is separated by a dot.
IP address
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