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  1. ABL - Always Be Labbin' Iristheangel's Avatar
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    #26
    BTW, it looks like this guy broke down the part of the blueprint you were talking about pretty well: https://ethernuno.wordpress.com/2016...dp-operations/

    Covers the following on the CCNP Route blueprint:
    1.5 Describe UDP operations
    1.5.a Starvation

    Also check out this link: Enterprise QoS Solution Reference Network Design Guide - MPLS VPN QoS Design [Design Zone for IPv6] - Cisco

    Mixing TCP with UDP
    It is a general best practice to not mix TCP-based traffic with UDP-based traffic (especially Streaming-Video) within a single service-provider class because of the behaviors of these protocols during periods of congestion. Specifically, TCP transmitters throttle back flows when drops are detected. Although some UDP applications have application-level windowing, flow control, and retransmission capabilities, most UDP transmitters are completely oblivious to drops and, thus, never lower transmission rates because of dropping.


    When TCP flows are combined with UDP flows within a single service-provider class and the class experiences congestion, TCP flows continually lower their transmission rates, potentially giving up their bandwidth to UDP flows that are oblivious to drops. This effect is called TCP starvation/UDP dominance.


    TCP starvation/UDP dominance likely occurs if (TCP-based) Mission-Critical Data is assigned to the same service-provider class as (UDP-based) Streaming-Video and the class experiences sustained congestion. Even if WRED is enabled on the service-provider class, the same behavior would be observed because WRED (for the most part) manages congestion only on TCP-based flows.


    Granted, it is not always possible to separate TCP-based flows from UDP-based flows, but it is beneficial to be aware of this behavior when making such application-mixing decisions within a single service-provider class.
    BS, MS, and CCIE #50931
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  3. /threadkiller ande0255's Avatar
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    #27
    Yes I've always just answered the broader term of just "starvation" of the mix of traffic flows.
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  4. /threadkiller ande0255's Avatar
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    #28
    Excuse that small head implosion, I remember the first time I was getting these multi answer questions that were tricky but I was confident, then the second time I nailed the sims at the beginning, so I had like 70+ minutes for Q/A's.

    I was just getting hit with some of the blueprint items that are obscure in the way that video instructors don't have them in their course (because their videos were made in 2014 or so), so I used more Cisco discussion board and documentation on the parts I was getting my balls broken in.

    I wasn't shocked to see the Fail again due to those answers, I'm going to give it one more try as I brought the score up a lot toward passing, so I can stop bitching about it
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  5. Junior Member
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    #29
    I absolutely know your frustration, but if you truly nailed the sims/simlets, it's hard to believe that the remaining Q&As could trip up a genuinely prepared person to the point of failure. After sitting ROUTE, I went back into Cisco's Official Cert Guide and looked up the topics on which some of the more frustratingly-worded questions were written, and sure enough, the answers that Cisco was looking for on the exam in most cases were indeed right there in the text, so I couldn't absolve myself of blame entirely for struggling on those. Of course, there were a handful of questions on topics that the official guide didn't detail to level that the exam demanded, or that the guide didn't touch on at all, and that is indeed infuriating. Again, however, even if one had failed each of these questions, a truly prepared person should still have had enough cushion to turn in a pass.

    So take a short amount of time to rage and vent, get over your blaming of Cisco, hit the books hard and focus in on those seemingly unimportant areas of text that you skimmed over before. If you've got the labbing side mastered, the hard work is already done.
    Last edited by mj30250; 06-12-2017 at 10:48 AM.
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  6. Senior Member scaredoftests's Avatar
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    #30
    Quote Originally Posted by Welly_59 View Post
    You can't skip in cisco exams
    Which drives me crazy. Sometimes, on is unsure how t answer and want to come back. Very frustrating..
    Never let your fear decide your fate....
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  7. Senior Member
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    #31
    That sucks but On the plus side you did like 200 points better then last time so 3rd time is probably the charm.
    In life you have to make your own opportunities. Don't let anyone stop you from your dreams to many negative people want you to fail because they can't succeed.
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  8. Senior Member
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    #32
    Quote Originally Posted by scaredoftests View Post
    Which drives me crazy. Sometimes, on is unsure how t answer and want to come back. Very frustrating..
    I agree
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  9. /threadkiller ande0255's Avatar
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    #33
    Yeah I rescheduled it 3 weeks out instead of 2, I need a non-Cisco week to not do anything study related.

    I verified that I completed the SIM objectives with verification commands, but it wouldn't take a copy run start for only some of them which I thought was weird, I'll get it next time though and get this ROUTE out of the way so I never have to sit this damn thing again.
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  10. Member
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    #34
    Copy run start isn't needed on the sims for you to pass them. That'd **** over too many people.
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  11. Senior Member Danielh22185's Avatar
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    #35
    Believe me when I say. I know your pain!! I am a horrible test taker and literally mentally lock up in certain testing scenarios. However put me in front of a command line and scream at me during a network outage I am cool as ice and can get what needs to be done, done.

    If you feel like giving it a read check out my thread. I went through many fails and frustrations. Believe me when I say though, after finally getting your certification in the mail, it's all worth it!

    My CCNP Journey
    Currently Studying: IE Stuff...kinda...for now...
    My ultimate career goal: To climb to the top of the computer network industry food chain.
    "Winning means you're willing to go longer, work harder, and give more than anyone else." - Vince Lombardi
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  12. Senior Member
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    #36
    Quote Originally Posted by ande0255 View Post
    Once you hit next after answering a question, there is no option to go back to a question.
    I also learned this the hard way when I failed my first CCNA 200-120 last year
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