Cisco 200-150 Exam

Which three statements are true concerning RFC 1918 IP addresses? (Choose three.)

  • A. They are globally routable.
  • B. They are not globally routable.
  • C. They must not be filtered at Internet border interfaces.
  • D. They should be filtered at Internet border interfaces.
  • E. They include 10.0.0.0/8, 172.16.0.0/16, and 192.168.1.0/24.
  • F. They include 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16.
Answer: Option B. D. F.
Explanation: 

“The Internet Assigned Numbers Authority (IANA) has reserved the following three blocks of the IP address space for private internets:
10.0.0.0 – 10.255.255.255 (10/8 prefix)
172.16.0.0 – 172.31.255.255 (172.16/12 prefix)
192.168.0.0 – 192.168.255.255 (192.168/16 prefix)”
http://tools.ietf.org/html/rfc1918

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