which is the answer

Unanswered Question
Nov 15th, 2007

I saw this in the global knowledge book I am studying.

Which 2 of these addresses are private ip addresses?

a) 10.215.34.124

b)127.16.71.43

c)172.17.10.10

d)225.200.15.10

I believe the answer should be A and C but the book lists A and D. I know 127 is reserved for loopback but I haven't read anywhere where it is considered private, are they considering it private because it can't be assigned to a network?

I have this problem too.
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scottmac Thu, 11/15/2007 - 13:42

10.215.34.124 and 172.17.10.10

Check out RFC 1918.

Three ranges:

10.{anything}

172.{16-31}.{anything}

and

192.168.{anything}.{anything}

Good Luck

Scott

Kevin Dorrell Fri, 11/16/2007 - 00:18

It just goes to show what a horribly ambiguous term is "private address". Does it mean an address that has no significance outside my administrative area? Or does it mean precisely the opposite: an address that is global but is reserved for me and for me only?

The term "private address" is right up there with "Ministry of Truth" (for George Orwell fans).

But either way you read it, the answer given in your book is just plain wrong.

This sort of thing makes me angry. There are few things worse than published training material that is plain wrong. How can we expect anyone to improve their skills if the training material is sloppy.

I think someone else already pointed out that mistake here and I ranted about it last time too.

Kevin Dorrell

Luxembourg

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