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| mccabe 2001-08-21, 1:17 pm |
| Which configuration mode and command combination sets the bandwidth metric of a Frame Relay connection?
a.router(config)# clock rate 56
b.router(config-if)# bandwidth 56
c.router(config)# bandwidth 56000
d.router(config-if)# clock rate 56000
cheet-sheets.com has the answer as being D. I think its B. Whos right? | |
| dmaftei 2001-08-21, 1:57 pm |
| They are right. | |
| Gareth Leung 2001-08-21, 2:05 pm |
| I think D is correct. | |
| doctorcisco 2001-08-21, 3:38 pm |
| quote:
Originally posted by mccabe
Which configuration mode and command combination sets the bandwidth metric of a Frame Relay connection?
a.router(config)# clock rate 56
b.router(config-if)# bandwidth 56
c.router(config)# bandwidth 56000
d.router(config-if)# clock rate 56000
cheet-sheets.com has the answer as being D. I think its B. Whos right?
Are you sure about that dmaftei? I'm 99.8% sure that "clock rate" sets the physical line speed on a DCE serial interface (I've only done it when setting up back-to-back cables in the lab), and takes an argument in bps. "bandwidth" sets the bandwidth metric on a serial interface, whether the connection is frame relay, point-to-point, or anything else, and takes its argument in kbps. The bandwidth metric is automatically populated on your interface if it's a WIC and you put in the timeslots and all that nifty CSU stuff.
Therefore if my memory serves, B is correct.
mccabe ... just trying to memorize questions and answers is probably not going to get you past the test next time, and certainly won't help you in the real world. I'd encourage you to spend more time in the books (Sybex, Cisco Press, whatever) learning and understanding the concepts and a lot less time reading test prep questions and asking us to check the answers.
HTH,
doctorcisco | |
| dmaftei 2001-08-21, 3:59 pm |
| quote:
Originally posted by doctorcisco
Are you sure about that dmaftei?
As a matter of fact I'm not. I guess it depends a lot on how you understand the question. When I read it, I took "bandwidth metric" to mean the bandwidth of the line, hence clock rate 56000. If you take it to mean "the bandwidth metric that is used by routing protocols blah blah blah", as you do -- and I think you are right -- then the answer should be B. Oh well, it's neither the first, nor the last time when I'm wrong... 
Flying home, where I don't have an Internet connection. [grin] Over and out. | |
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| D would be right if it were asking for the Clock Rate, but B is the correct one since Bandwidth is what your question is asking for. | |
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| The answer to this question is very simple.
You need to ask your self the question what does bandwidth have to do with Frame Relay.
You only set the bandwidth when you use IGRP routing protocol. What does this question have to do with IGRP. Only Clock Rate has anything to do with a serial connection. I just finished taking the CCNA exam and this was one of my questions. I also have the Cheet-Sheets and this question was on there as well. The answer is %100 D. | |
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| I stand corrected. Good catch. | |
| steeda 2001-08-22, 9:11 pm |
| I disagree. Clock Rate is NOT a metric. Bandwidth is. A metric implies one of the "parts" used to figure out the best route. The best route CAN be out a serial interface configured for Frame Relay. The answer is B, period. :P | |
| mccabe 2001-08-22, 11:26 pm |
| bye the way
this was just a question i was wondering about. that i saw on that cheet-sheets.com sample questions that i was confused about. I have read the sibex book 3 times now and plan on taking my test tuesday. | |
| sallama18 2001-08-23, 12:31 am |
| I think aswer is B. There is no relationship between metric and clock rate.And clock rate command is not necessary for frame relay also. | |
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| I just finished with my CNT170 Class and this question was also one of my final quiz questions and over half of the class chose B. However my CCNP certifed instructor expained it to us and the answer is D. There is no doubt in my mind. Do you really think CISCO is going to put this question in there Academy Training and not answer it correctly. | |
| AndyC 2001-08-23, 12:22 pm |
| For what it's worth, I think BBBBBBBBBBBBBBBBBBBBBBBBBBBBBB
BBBBBBBBBBBBBBBBBBBBBBBBBBBBBB
BBBBBBBBBBBBBBBBBBBBBBBBBBBBBB
.
I may be wrong but hey, nobody's perfect | |
| steeda 2001-08-23, 2:18 pm |
| It's B. The question is asking about a metric. The clock rate command doesn't set a metric. Clock Rate is used when the router is acting as a DCE to set an acceptable bitrate for the interface. The question is asking how to set the bandwidth METRIC. Clock rate does not set a bandwidth METRIC. Regardless of your instructors certification status, the answer is B. Again, clock rate is usually used in a lab environment to SIMULATE a carrier line. You won't set clock rate at all typically in a frame relay scenario. You WILL set bandwidth if you don't want the default ( T1 ) speed used. Just for kicks, turn to page 419 of Cisco's ICND coursebook. Here are the following commands, EXACTLY as they appear in a typical frame relay configuration:
HQ(config)#interface Serial1
HQ(config-if)#ip address 10.16.0.1 255.255.255.0
HQ(config-if)#encapsulation frame-relay
HQ(config-if)#bandwidth 64
pddw: you have it wrong man, and so does your instructor. Don't make people miss this question on the test. I provided my own explanation, AND a DIRECT QUOTE from Cisco's OWN ICDN coursebook.
Again, the answer is B. | |
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| Ounce again I am telling you the answer is D not B. I am not trying to make anyone miss this question however if you listen to steeda
you are going to get it wrong. I understand he has a good point and so did half the people in my class when they got it wrong. I am forwarding Steeda's reply to the thread to my instructor to explain why it is correct. I am not trying to downplay steeda and his answer or trying to make anybody miss this answer. I am just trying to help like everyone else. | |
| steeda 2001-08-23, 4:18 pm |
| Open the ICND book man :P Open any Cisco reference. Did you look at the page I referred to? I am referring you to documented explanations. You refer to your 'CCNP Instructor'. I know if you open the ICND book or just about any Cisco book you'll see whats up. I'll scan the page when I get home and post it just in case you don't have the ICND coursebook. Also, you wil find yourself setting the bandwidth metric in a REAL networking environment configuring frame relay, not just in some lab :P | |
| steeda 2001-08-23, 4:21 pm |
| Also, to further support my explanation:
I got 100% in the WAN Protocol section on the CCNA test. Was this question there? I am not divulging test information, but I did get 100% on WAN Protocols.
And pddw your comment:
"Only Clock Rate has anything to do with a serial connection"
is totally false. The bandwidth command is completely FOR a serial connection! You don't use it on Ethernet interfaces at ALL! I ask you to just check my sources, and also realize my experience is not limited to a classroom. Your understanding of the concept is not correct, and I wish you would just check it out! I don't like to argue on message boards, and would only offer my "opinion" when someone is dead wrong. | |
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| Hey Steeda,
I just looked at my results and I received my lowest score in the WAN protocols section. So if you received a %100 I would go with B. No matter what the real answer is its the one on the test that counts. | |
| mrgrunge 2001-08-23, 8:05 pm |
| Therer is a difference between bandwidth and clock rate. Study the differences. | |
| strikeattack 2001-08-24, 7:30 am |
| Clockrate is the physical speed the line is clocked at. Bandwidth has nothing to do with the speed of the line, only how metrics are calculated. For example, in EIGRP. Bandwidth is specified in Kb/s.
Answer: B | |
| dmaftei 2001-08-24, 7:44 am |
| Man, is this thread beaten to death, or what...
quote:
Originally posted by steeda
The bandwidth command is completely FOR a serial connection! You don't use it on Ethernet interfaces at ALL!
That is incorrect. The bandwidth command is used on all types of interfaces to set the bandwidth metric, which is used by upper layer protocols. |
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