A user gets an IP address of 192.168.0.1 from the company network administrator. A friend of the user at a different company gets the same IP address on another PC. How can two PCs use the same IP address and still reach the Internet, send and receive email, and search the web?

A user gets an IP address of 192.168.0.1 from the company network administrator. A friend of the user at a different company gets the same IP address on another PC. How can two PCs use the same IP address and still reach the Internet, send and receive email, and search the web?

  • Both users must be using the same Internet Service Provider.
  • ISPs use Network Address Translation to change a user IP address into an address that can be used on the Internet.
  • ISPs use Domain Name Service to change a user IP address into a public IP address that can be used on the Internet.
  • Both users must be on the same network.
    Answers Explanation & Hints:

    As user traffic from behind an ISP firewall reaches the gateway device, Network Address Translation changes private IP addresses into a public, routable IP address. Private user addresses remain hidden from the public Internet, and thus more than one user can have the same private IP address, regardless of ISP.

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