Let me try to respond for CertZone. It looks like somebody mentally merged two questions. Network clearly is the answer for enabling hop-by-hop communications. A _set_ of hop-by-hop devices enables end-to-end communications. So, the explanation is right for transport, but the question is wrong.
Actually, in a very subtle way, I could argue the question is right, because no end-to-end communications at the transport layer will take place unless the network layer works. But I won't argue that, because it's just too perverse a phrasing. I would change the question to remove the hop-by-hop phrase, and replace it with end-to-end. Can you tell us the question number or when you received it, so we can correct it? I'm afraid, though, that it looks like my writing style, and, if so, I can only claim a mental slip. I might have been writing two related questions and, in editing, gotten the question lines reversed. >Good Luck next week let us know how you did. >You will be fine. >I have found a few objectional questions from cert-zone, but they are quick >to accept input and make corrections to their material where necessary or >expand on why and what the thinking was behind the question. They are a >dedicated group of people. >You should post the question to the main [EMAIL PROTECTED] list, there >are many contributers to cert-zone that regularly read the board. You can >probably get the author or one of their technical reviewers to clarify the >issue for you on that board. >I am going to copy those groups in this response so that everyone can >benefit, being that those are widely published questions in these parts. >Don > > >----- Original Message ----- >From: "Marcial Rosales Garcia" >To: "'Donald B Johnson Jr'" >Sent: Thursday, June 27, 2002 4:32 AM >Subject: RE: Question about OSI [1:9811] > > >> Hi Donald, >> >> I have been for a while because I had to leave my studying for 5-6 >> months. Because I am not looking just a degree or cert, because I already >> hold 5 years degree, I am not in a hurry to obtain the CCNA. I want to be >> very confident and skilled to be a real CCNA and then pass the exam. >> I am planning to take the exam next week, although I feel confident >> with many areas, sometimes I find answers to questions that screw me up. >> Sometimes they are questions from cisco sources, that are contridictory >with >> the documentation or sometimes cannot see clearly that the answer is >> correct. >> The question I have posted comes from CertificationZone, most of the >> questions (free, because I don't pay money for questions) are correct and >> looks quite interesting, however, with this one I disagreed. >> >> What I understood about "dumb" is that you meant the question was >> silly or stupid, or so simple that there wan't any need to ask it. That's >> why I responsed "I don't see (the question) so dumb". >> >> I think that certification is not any race, I think is a reward to >> your effort along your career. I studied pretty hard to get the JAva >> Certification (6 months + prof. experience), I got 91% (minimum is 54%); >> however, I know people who just studied 1 months (without experience) >(they >> wanted to get at least a degree that says: I can program in java) and got >> 55%. Without studying, just making some mock exams you get that average, >so >> how knowledge has this guy about java? >> >> Thank you for your response, Donald. >> I wish we talk in other moment. >> >> Best regards >> Marcial Rosales >> >> -----Original Message----- >> From: Donald B Johnson Jr [mailto:[EMAIL PROTECTED]] >> Sent: 26 June 2002 21:51 >> To: [EMAIL PROTECTED]; [EMAIL PROTECTED]; Marcial Rosales >> Garcia >> Subject: Re: Question about OSI [1:9811] >> >> >> Marcial >> I don't understand the statement "I don't see so dumb" please clarify. >> You are correct hops are routers. >> What I meant was the question is dumb because it is worded very poorly and >> in my opinion the answer they are stating "trsansport" is incorrect. > > You made the statement "I found a question", that is dubious at best. >> You should cite the source of the question when posting. You can run >across >> an endless supply of hot-shots posting Q&A on the internet. Remember the >> question and information are only as good as the source. >> What I am saying is be careful, check sources, and cross reference >> information. You would have a hard time finding another resource talking >> about "hop-by-hop communication" at the transport layer. Also my substance >> reasoning is; >> Scenario: You are down to the last ? on your CCNA test. get it right and >you >> pass, get it wrong and you fail. I would not want to hang my hat on that >> info, if the question was based around the concept of hops. >> By the way you have been on this group for awhile; Have you taken the >test? >> When will you take the test? Are you a CCNA? >> Don >> >> >> > >> > I don't see so dumb, that's why I ask. >> > I think that the devices which enable hop-by-hop communications are >> > the router (network layer) and not the transport. Or maybe I am >> > misunderstanding the question. >> > I am serious, I am not joking. >> > >> > -----Original Message----- >> > From: Donald B Johnson Jr [mailto:[EMAIL PROTECTED]] >> > Sent: 26 June 2002 18:26 >> > To: Marcial Rosales Garcia; [EMAIL PROTECTED] >> > Subject: Re: Question about OSI [1:9811] >> > >> > >> > That is a really dumb question. >> > Thank You, >> > >> > Donald B Johnson Jr >> > Adelphia Telecommunications Corp. >> > Engineering/Technical Operations >> > Corporate Manager Technical Support Services >> > CCNP CCDP MCSE + I >> > P# 888-277-6872 support line >> > Pg# 866-690-9276 pager >> > P# 814-260-3259 office >> > F# 814-260-3227 fax >> > [EMAIL PROTECTED] >> > >> > >> > >> > ----- Original Message ----- >> > From: "Marcial Rosales Garcia" >> > To: >> > Sent: Wednesday, June 26, 2002 1:37 PM >> > Subject: Question about OSI [1:9811] >> > >> > >> > > Hi all, I have found the following question which answer is not the >> > > one I had expected: Network. >> > > >> > > To enable hop-by-hop communications across an internetwork, you would >> need >> > > to install a device operating at which layer? >> > > >> > > a) Transport >> > > b) Physical >> > > c) Network >> > > d) Data Link >> > > Answer >> > > a) Transport >> > > Explanation >> > > Devices working at the Transport layer of the OSI model are >responsible >> > for >> > > end-to-end communications across an internetwork. Such devices are >most >> > > commonly clients or servers. They use network addresses of the >> endpoints, >> > > coupled with identifiers called port or socket numbers. Think of a >port >> > > number as having the relationship to a network address that an >extension >> > > number does to a telephone number. The telephone number is unique in >the >> > > telephone system, but extension numbers are unique only with respect >to >> a >> > > telephone number. >> > > [ >> > > >> > > > > > > Marcial Rosales -- "What Problem are you trying to solve?" ***send Cisco questions to the list, so all can benefit -- not directly to me*** ******************************************************************************** Howard C. Berkowitz [EMAIL PROTECTED] Chief Technology Officer, GettLab/Gett Communications http://www.gettlabs.com Technical Director, CertificationZone.com http://www.certificationzone.com "retired" Certified Cisco Systems Instructor (CID) #93005 Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=47571&t=9811 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
