2 Hard Questions for Experts

Hi everybody!

I have a really hard questions for any expert that can answer and explain it, i'll appreciate if anyone can solve this...

1. Which of the next network addresses is private and why:

- 200.260.1.0
- 92.1.200.0
- 192.168.0.0
- 254.255.1.1

2. Which is the resolution name order in Windows 2000, Windows XP and Windows 2003:

- DNS - LMHOSTS- Host - WINS
- Host - DNS - LMHOSTS - WINS
- DNS - LMHOSTS - WINS - Host

(**PD: It's possible that any answer or question have some "traps" so please try to answer with an explanation and not with links)

About this: I'm applying for a job in a large size company, they gave to me a exam that i have to resolve in 48 hours no matters how but only in 48 hours.

Obviously the exam have questions that a Jr. Technician can't solve.

I'll appreaciate the help of anyone about this two questions , don't do this only for me, do it for knowledge and take it as a ret!

 

ok, no links - lesson one: google.

 

1) 192.168.0.0 Simple answer: 0 and 255 are normally reserved numbers.

http://www.duxcw.com/faq/network/privip.htm

http://en.wikipedia.org/wiki/Private_network

So when you start seeing a bunch of 0's or 255 in the host part of the IP, would be an unusual IP. Been a bit since I messed with this stuff, perhaps a more knowledgeable Geek can expand on it.

2) I have no clue.

 

192.168.0.0 is the only private address. The first two are registered to STARTEL and Carphone Warehouse Broadband Service. The last is part of the IANA Special Use/Reserved block (240.0.0.0 - 255.255.255.255).

RFC 1918 Address Allocation for Private Internets February 1996


3. Private Address Space

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)

We will refer to the first block as "24-bit block", the second as
"20-bit block", and to the third as "16-bit" block. Note that (in
pre-CIDR notation) the first block is nothing but a single class A
network number, while the second block is a set of 16 contiguous
class B network numbers, and third block is a set of 256 contiguous
class C network numbers.

An enterprise that decides to use IP addresses out of the address
space defined in this document can do so without any coordination
with IANA or an Internet registry. The address space can thus be used
by many enterprises. Addresses within this private address space will
only be unique within the enterprise, or the set of enterprises which
choose to cooperate over this space so they may communicate with each
other in their own private internet.

As before, any enterprise that needs globally unique address space is
required to obtain such addresses from an Internet registry. An
enterprise that requests IP addresses for its external connectivity
will never be assigned addresses from the blocks defined above.

In order to use private address space, an enterprise needs to
determine which hosts do not need to have network layer connectivity
outside the enterprise in the foreseeable future and thus could be
classified as private. Such hosts will use the private address space
defined above. Private hosts can communicate with all other hosts
inside the enterprise, both public and private. However, they cannot
have IP connectivity to any host outside of the enterprise. While not
having external (outside of the enterprise) IP connectivity private
hosts can still have access to external services via mediating
gateways (e.g., application layer gateways).

All other hosts will be public and will use globally unique address
space assigned by an Internet Registry. Public hosts can communicate
with other hosts inside the enterprise both public and private and
can have IP connectivity to public hosts outside the enterprise.
Public hosts do not have connectivity to private hosts of other
enterprises.

I don't know about the second question. Good luck with the test and interview.

 

Good point Kes. :-D

 

Kes, I don't have a problem with someone asking a question for a test, or for a job. But, at some point, they will sink or swim. I hope they swim on their own. Sometimes, when you are too close to something, it is hard to find the answer. Sometimes, the Geeks mess with you...

 

Guys! tx for answer, i'm facing the other problems with the engineers of the company that i'm working.

Other problems refeer to real cases of the company that i'm applying for. IT's so hard that 4 engieneers took 4 days to solveone of that problems.

Anyway, i really appreciate this.

About that ppl says, in the interview they explained to me that i needed to ask Senior ppl because i have to explain the answers. They're testing my hability to "move the world" and find solutions, and this is one way, ask to the correct people that are you guys.

TX!

 

Actually my first response was a bit more harsh, so I toned it down.
But personally if I was to ask a question in a forum like this I'd be nice and not demanding by setting limitations on the answers (no links). When the advice is free be grateful for what you get.
But for question 1 google "ip classes" - it will explain what IP are private & public, for #2 google "name resolution" & you'll see option #2 is the answer, why do I need to retype the info here?

In school we had a teacher drive subnetting into our heads claiming one student went to a job interview and the only question was to subnet a network. I've been on a few interviews, if you get any tech questions
it is usually some form of an A+ type test.

 

Tx foogoo, i understand that, anyawy i said "no links" but that doesn't really maters, i was searching for an explanation more than a link.

Because i only have 48 hours and i have to read lot of Raid Configurations, Domain Controller problems, Webserver problems, best distribution for MS SQL Server including logs, swap, file systems, S.O and hardware distribution, Blade Server problems....

Well i have a lot to read and is more usefull for me an explanation, but any link works too i appreciate all efforts in this issue, and if iget or not the job i'll share all the feedback of this complex thing.

Hugs.