Peter Paluch Mon, 09/06/2010 - 12:54
User Badges:
  • Cisco Employee,


I do not know for sure but I assume that the IP address space was set aside for loopback purposes so that you can create an entire "internetwork" inside your PC. Having just a single address would be quite limiting if you wanted to test scenarios on your PC that required more IP addresses. Having the entire A block at your discretion for loopback purposes provides you with a great flexibility in choosing IP addresses according to your needs.

See the RFC 5735 at for slightly more information about this.

Best regards,



This Discussion