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| rodocola 2001-04-23, 12:36 pm |
| 13. What is the protocol and what is the purpose of following address
238.255.255.25
a. IPX, a SAP broadcast
b. 10.a multiple cost
c. IP, a researched address
d. IP a direct broadcast
e. IPX, a flooded broadcast | |
| dmaftei 2001-04-23, 12:53 pm |
| It's an IP multicast (class D) address. None of the given choices is correct.
P.S.
I have a feeling I answered this question before. Hmm... | |
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| ip routed protocol use this addressing format - so called dotted notation. It should be a class C address - 238.x.x.x | |
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| given address is mistyped or something | |
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| correction: given address 238.x.x.x should be a class D address, so answer is: d. ip a direct broadcast | |
| dmaftei 2001-04-24, 7:26 am |
| 238.255.255.255 is a multicast (class D) adress, period.
Class D is unstructured; that is, there is no concept of network, subnet, broadcast address or host address. Every address in the D class denotes a multicast group. Not a subnet, not a broadcast, not a host. A group.
Cheers! | |
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| the question is testing if you know say in a network of 10 nodes, a selected number of these 10 can be addressedat the same time using a single address(multicast or directed broadcast) instead of addressing them all(general broadcast or flooded broadcast). so the best answer is d. | |
| dmaftei 2001-04-24, 9:21 am |
| The question is
quote:
13. What is the protocol and what is the purpose of following address 238.255.255.25
and none of the given choices is correct, because 238.255.255.255 is a multicast address.
Now, I understand you have no reason to believe me (I might as well be wrong), so I suggest you look for a serious source. One of the best places on the Web (and the authoritative source when it comes to IP addressing), is the IETF: www.ietf.org. Or you can go directly to the rfc Editor's search page: http://www.rfc-editor.org/rfcsearch.html.
Cheers! | |
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| since multicast is not among the choices, so direct broadcast is the only alternative. here we are discussing general ip addressing concept instead of exact concept. different people use different words to mean the same thing. you see, i used a network of 10 nodes to try to explain the concept of using directed broadcast or flooded broadcast address. in real life, i dont think someone would use multicast address in a commercial production network of only 10 nodes.
my choice is still d. | |
| dmaftei 2001-04-24, 10:04 am |
| quote:
Originally posted by EP-3
since multicast is not among the choices, so direct broadcast is the only alternative. here we are discussing general ip addressing concept instead of exact concept. different people use different words to mean the same thing. you see, i used a network of 10 nodes to try to explain the concept of using directed broadcast or flooded broadcast address. in real life, i dont think someone would use multicast address in a commercial production network of only 10 nodes.
my choice is still d.
So be it... | |
| Bernie 2001-04-24, 10:14 am |
| quote:
Originally posted by EP-3
since multicast is not among the choices, so direct broadcast is the only alternative.
my choice is still d.
What if the correct answer is not listed? Where did this question come from? | |
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| who cares where it comes from & remember your goal is to pick the best answer from choices that you dont like whether they are ugly worded or the " true" answer is not even listed. | |
| dmaftei 2001-04-24, 10:27 am |
| quote:
Originally posted by Bernie
Where did this question come from?
Bernie,
I have no idea where this question comes from, but it's obvious that whoever created it has a looooong way to go in the IP addressing field.  | |
| Bernie 2001-04-24, 10:46 am |
| quote:
Originally posted by EP-3
who cares where it comes from & remember your goal is to pick the best answer from choices...
I've heard/seen issues like this on the old school Network+ exam but not on Cisco exam. The question appears to be wrong, why rack your brains on an invalid question. His test questions already has a duplicate question with the correct answer. | |
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| i understand what you mean but be prepared to encounter exam questions of this type if you will sit any further IT exams whether it is cisco, microsoft or the like. microsoft exam questions are probably the most unwanted as sometimes you are asked to pick all that apply. they dont tell you how many to pick, just pick your own. even worst is when none of the choices you see seems correct. | |
| creamy_stew 2001-04-24, 11:49 am |
| LOL, don't go there dmaftei
/me mounts his high horse
Personally, I think it's something of a disgrace that someone can get MCSE/MCP+I and still manage not to know the address class boundaries. Not very contructive criticizm, I know, but come on!
As for the question, this is my take on it:
Step One
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b. IP, a multicast is probably scribbled down by Joe Cheetah when he takes the exam
Step two
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The above is then "translated" to b. 10.a multiple cost by I@m.a.moron.to
Step three
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This masterpiece finds its way here, where it wastes time for people like dmaftei, who are trying to help serious students
#umount high_horse
/creamy | |
| dmaftei 2001-04-24, 12:08 pm |
| quote:
Originally posted by creamy_stew
Step One
---------
Step two
---------
Step three
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LOL!!
Have you ever considered writing screenplays? Your step by step description is so cinematic, I practically saw Joe Cheetah scribbling down... | |
| creamy_stew 2001-04-26, 4:21 am |
| *Blush*
Perhaps I shall one day be known as creamy_stew T.W. - Technical Writer with a soft spot for drama
Combining the sex appeal(?) of Magnum P.I and the literary mind of Shakespeare into one glorious demi-god of a being.
Or...perhaps this is just the cough sirup talking again 
/creamy |
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