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fjohnson
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Post subject: ICND1Question
Posted: Thu Jul 21, 2011 10:27 am
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If a host needs to resolve an ip address and a mac-address, what services needs to be used.
A- ARP
B- RARP
C- DNS
D- DHCP

would the answer be (C- DNS)?
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Cormac Doyle
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Post subject:
Posted: Thu Jul 21, 2011 10:35 am
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resolving between MAC and IP is ARP/RARP

DNS/rDNS allow for the resolving between Computer Name and IP address

DHCP allows for the assignment of an IP address via temporary lease to a designated MAC address

The wording of the question is poor - resolve the IP address from what? Resolve the MAC address from what?

If you are given a computer name, you use DNS to resolve the IP address, and then uses ARP to convert the IP address into a MAC address

To go from the MAC address, you would use RARP to get the IP address, and then perform a reverse DNS lookup to get the computer name.
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fjohnson
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Post subject:
Posted: Thu Jul 21, 2011 10:44 am
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This is a question that I was asked on the ICND 1 exam, and I was stumped. I thought it was RARP but wasn't sure, but went back to my notes and the only clue that I came up was "DNS resolves".
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itguy2060
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Posted: Thu Oct 11, 2012 12:14 pm
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DNS is used to resolve names to IP addresses and vice versa. RARP has been rendered obsolete by DHCP, also RARP is not used to resolve IP addresses of hosts, it was only used for the host to look up its own IP address. Thus, the only answer would be ARP.
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leonlimsg
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Posted: Thu Apr 11, 2013 10:21 am
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Is a bad question.

Should be ARP. Resolving mac address using IP.
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david_brent
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Posted: Sun Apr 14, 2013 2:08 am
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I would also say A - ARP.
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certiology
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Posted: Fri May 30, 2014 3:50 pm
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A- ARP is correct answer. ARP resolves mac using IP address.

DHCP automatically assign IP addresses.

DNS resolve domain name to IP.
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amitpandey240
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Posted: Sat May 31, 2014 3:53 pm
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right answer is ARP[/quote]
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