Which three statements are true concerning RFC 1918 IP addresses?

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

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, 172.16.0.0/21, and 192.168.0.0/16.

Explanation:
“The Internet Assigned Numbers Authority (IANA) has reserved thefollowing 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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Adam

Adam

I believe the E and F are both correct, as all the subnets fall inside the private address space.

That said, I think that in F, they have a typo, and it should be a mask of /12 instead of /21. That would match up right with RFC1918, so I’m sure that’s the answer they’re looking for.

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